1055866404 has 48 divisors (see below), whose sum is σ = 2609358080. Its totient is φ = 331374240.

The previous prime is 1055866403. The next prime is 1055866429. The reversal of 1055866404 is 4046685501.

It is a happy number.

It is a super-2 number, since 2×1055866404² = 2229707726191782432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055866403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22959 + ... + 51369.

Almost surely, 2^1055866404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055866404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304679040).

1055866404 is an abundant number, since it is smaller than the sum of its proper divisors (1553491676).

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

1055866404 is a wasteful number, since it uses less digits than its factorization.

1055866404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28600 (or 28598 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1055866404 is about 32494.0979871730. The cubic root of 1055866404 is about 1018.2857287378.

The spelling of 1055866404 in words is "one billion, fifty-five million, eight hundred sixty-six thousand, four hundred four".