1902985440 has 192 divisors, whose sum is σ = 6412633920. Its totient is φ = 472678400.

The previous prime is 1902985433. The next prime is 1902985453. The reversal of 1902985440 is 445892091.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1902985392 and 1902985401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823006 + ... + 825314.

It is an arithmetic number, because the mean of its divisors is an integer number (33399135).

Almost surely, 2^1902985440 is an apocalyptic number.

1902985440 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 1902985440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3206316960).

1902985440 is an abundant number, since it is smaller than the sum of its proper divisors (4509648480).

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

1902985440 is a wasteful number, since it uses less digits than its factorization.

1902985440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 1902985440 is about 43623.2213390987. The cubic root of 1902985440 is about 1239.2107013007.

The spelling of 1902985440 in words is "one billion, nine hundred two million, nine hundred eighty-five thousand, four hundred forty".