1055819904 has 32 divisors (see below), whose sum is σ = 2804522640. Its totient is φ = 351939840.

The previous prime is 1055819887. The next prime is 1055819909. The reversal of 1055819904 is 4099185501.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1055819904² = 2229511339365138432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055819909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374382 + ... + 1375149.

Almost surely, 2^1055819904 is an apocalyptic number.

It is an amenable number.

1055819904 is an abundant number, since it is smaller than the sum of its proper divisors (1748702736).

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

1055819904 is an equidigital number, since it uses as much as digits as its factorization.

1055819904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749548 (or 2749536 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 1055819904 is about 32493.3824647420. The cubic root of 1055819904 is about 1018.2707801984.

The spelling of 1055819904 in words is "one billion, fifty-five million, eight hundred nineteen thousand, nine hundred four".