2856404 has 12 divisors (see below), whose sum is σ = 5115264. Its totient is φ = 1394904.

The previous prime is 2856397. The next prime is 2856409. The reversal of 2856404 is 4046582.

It is a super-2 number, since 2×2856404² = 16318087622432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856409) 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, 8132 + ... + 8475.

It is an arithmetic number, because the mean of its divisors is an integer number (426272).

2^2856404 is an apocalyptic number.

It is an amenable number.

2856404 is a deficient number, since it is larger than the sum of its proper divisors (2258860).

2856404 is a wasteful number, since it uses less digits than its factorization.

2856404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16654 (or 16652 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2856404 is about 1690.0899384352. The cubic root of 2856404 is about 141.8861085055.

The spelling of 2856404 in words is "two million, eight hundred fifty-six thousand, four hundred four".