1008997440 has 112 divisors (see below), whose sum is σ = 3494836800. Its totient is φ = 244602880.

The previous prime is 1008997427. The next prime is 1008997463. The reversal of 1008997440 is 447998001.

It is a junction number, because it is equal to n+sod(n) for n = 1008997392 and 1008997401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37215 + ... + 58334.

It is an arithmetic number, because the mean of its divisors is an integer number (31203900).

Almost surely, 2^1008997440 is an apocalyptic number.

1008997440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1008997440 is an abundant number, since it is smaller than the sum of its proper divisors (2485839360).

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

1008997440 is a wasteful number, since it uses less digits than its factorization.

1008997440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95580 (or 95570 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1008997440 is about 31764.7200522844. The cubic root of 1008997440 is about 1002.9901964796.

The spelling of 1008997440 in words is "one billion, eight million, nine hundred ninety-seven thousand, four hundred forty".