1099402872 has 32 divisors (see below), whose sum is σ = 2749340880. Its totient is φ = 366356480.

The previous prime is 1099402859. The next prime is 1099402891. The reversal of 1099402872 is 2782049901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124888 + ... + 133400.

Almost surely, 2^1099402872 is an apocalyptic number.

1099402872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1099402872 is an abundant number, since it is smaller than the sum of its proper divisors (1649938008).

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

1099402872 is a wasteful number, since it uses less digits than its factorization.

1099402872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13903 (or 13899 counting only the distinct ones).

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

The square root of 1099402872 is about 33157.2446382386. The cubic root of 1099402872 is about 1032.0932927499.

The spelling of 1099402872 in words is "one billion, ninety-nine million, four hundred two thousand, eight hundred seventy-two".