1902997040 has 40 divisors (see below), whose sum is σ = 5056536480. Its totient is φ = 652455936.

The previous prime is 1902997039. The next prime is 1902997049. The reversal of 1902997040 is 407992091.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1902997049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1698545 + ... + 1699664.

It is an arithmetic number, because the mean of its divisors is an integer number (126413412).

Almost surely, 2^1902997040 is an apocalyptic number.

1902997040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1902997040 is an abundant number, since it is smaller than the sum of its proper divisors (3153539440).

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

1902997040 is a wasteful number, since it uses less digits than its factorization.

1902997040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398229 (or 3398223 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1902997040 is about 43623.3542956064. The cubic root of 1902997040 is about 1239.2132192417.

The spelling of 1902997040 in words is "one billion, nine hundred two million, nine hundred ninety-seven thousand, forty".