1055204640 has 144 divisors (see below), whose sum is σ = 4115337408. Its totient is φ = 241187328.

The previous prime is 1055204609. The next prime is 1055204669. The reversal of 1055204640 is 464025501.

1055204640 is a `hidden beast` number, since 10 + 5 + 5 + 2 + 0 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1055204640² = 2226913664555059200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42262 + ... + 62421.

It is an arithmetic number, because the mean of its divisors is an integer number (28578732).

Almost surely, 2^1055204640 is an apocalyptic number.

1055204640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055204640 is an abundant number, since it is smaller than the sum of its proper divisors (3060132768).

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

1055204640 is a wasteful number, since it uses less digits than its factorization.

1055204640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104711 (or 104700 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1055204640 is about 32483.9135573286. The cubic root of 1055204640 is about 1018.0729475043.

The spelling of 1055204640 in words is "one billion, fifty-five million, two hundred four thousand, six hundred forty".