1849872640 has 216 divisors, whose sum is σ = 5565010752. Its totient is φ = 572375040.

The previous prime is 1849872637. The next prime is 1849872643. The reversal of 1849872640 is 462789481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1849872637) and next prime (1849872643).

It is not an unprimeable number, because it can be changed into a prime (1849872643) 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, 13502652 + ... + 13502788.

Almost surely, 2^1849872640 is an apocalyptic number.

1849872640 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 1849872640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782505376).

1849872640 is an abundant number, since it is smaller than the sum of its proper divisors (3715138112).

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

1849872640 is an equidigital number, since it uses as much as digits as its factorization.

1849872640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 1849872640 is about 43010.1457798041. The cubic root of 1849872640 is about 1227.5728548670.

The spelling of 1849872640 in words is "one billion, eight hundred forty-nine million, eight hundred seventy-two thousand, six hundred forty".