1051640404 has 12 divisors (see below), whose sum is σ = 1899737728. Its totient is φ = 508858200.

The previous prime is 1051640399. The next prime is 1051640411. The reversal of 1051640404 is 4040461501.

It is a super-2 number, since 2×1051640404² = 2211895078650566432, which contains 22 as substring.

It is a congruent number.

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, 4240362 + ... + 4240609.

Almost surely, 2^1051640404 is an apocalyptic number.

It is an amenable number.

1051640404 is a deficient number, since it is larger than the sum of its proper divisors (848097324).

1051640404 is a wasteful number, since it uses less digits than its factorization.

1051640404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481006 (or 8481004 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1051640404 is about 32429.0055968418. The cubic root of 1051640404 is about 1016.9253832064.

The spelling of 1051640404 in words is "one billion, fifty-one million, six hundred forty thousand, four hundred four".