1878901640 has 256 divisors, whose sum is σ = 5622220800. Its totient is φ = 547430400.

The previous prime is 1878901637. The next prime is 1878901649. The reversal of 1878901640 is 461098781.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1878901591 and 1878901600.

It is not an unprimeable number, because it can be changed into a prime (1878901649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5676275 + ... + 5676605.

It is an arithmetic number, because the mean of its divisors is an integer number (21961800).

Almost surely, 2^1878901640 is an apocalyptic number.

1878901640 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 1878901640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2811110400).

1878901640 is an abundant number, since it is smaller than the sum of its proper divisors (3743319160).

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

1878901640 is a wasteful number, since it uses less digits than its factorization.

1878901640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1878901640 is about 43346.2990346350. The cubic root of 1878901640 is about 1233.9607576217.

The spelling of 1878901640 in words is "one billion, eight hundred seventy-eight million, nine hundred one thousand, six hundred forty".