1055980644 has 12 divisors (see below), whose sum is σ = 2463954864. Its totient is φ = 351993544.

The previous prime is 1055980633. The next prime is 1055980661. The reversal of 1055980644 is 4460895501.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1055980644² = 2230190241005309472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055980596 and 1055980605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43999182 + ... + 43999205.

It is an arithmetic number, because the mean of its divisors is an integer number (205329572).

Almost surely, 2^1055980644 is an apocalyptic number.

It is an amenable number.

1055980644 is an abundant number, since it is smaller than the sum of its proper divisors (1407974220).

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

1055980644 is a wasteful number, since it uses less digits than its factorization.

1055980644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87998394 (or 87998392 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1055980644 is about 32495.8557973167. The cubic root of 1055980644 is about 1018.3224520600.

The spelling of 1055980644 in words is "one billion, fifty-five million, nine hundred eighty thousand, six hundred forty-four".