1887248640 has 216 divisors, whose sum is σ = 6211961280. Its totient is φ = 488300544.

The previous prime is 1887248639. The next prime is 1887248641. The reversal of 1887248640 is 468427881.

It is an interprime number because it is at equal distance from previous prime (1887248639) and next prime (1887248641).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1887248640.

It is not an unprimeable number, because it can be changed into a prime (1887248641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5256781 + ... + 5257139.

It is an arithmetic number, because the mean of its divisors is an integer number (28759080).

Almost surely, 2^1887248640 is an apocalyptic number.

1887248640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1887248640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3105980640).

1887248640 is an abundant number, since it is smaller than the sum of its proper divisors (4324712640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1887248640 is an equidigital number, since it uses as much as digits as its factorization.

1887248640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 48.

The square root of 1887248640 is about 43442.4750676110. The cubic root of 1887248640 is about 1235.7853441077.

The spelling of 1887248640 in words is "one billion, eight hundred eighty-seven million, two hundred forty-eight thousand, six hundred forty".