400912836 has 24 divisors (see below), whose sum is σ = 990491040. Its totient is φ = 125776512.

The previous prime is 400912823. The next prime is 400912859. The reversal of 400912836 is 638219004.

It is a super-2 number, since 2×400912836² = 321462204139125792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400912797 and 400912806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982426 + ... + 982833.

It is an arithmetic number, because the mean of its divisors is an integer number (41270460).

Almost surely, 2^400912836 is an apocalyptic number.

It is an amenable number.

400912836 is an abundant number, since it is smaller than the sum of its proper divisors (589578204).

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

400912836 is a wasteful number, since it uses less digits than its factorization.

400912836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965283 (or 1965281 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 400912836 is about 20022.8078949981. The cubic root of 400912836 is about 737.3663600041.

The spelling of 400912836 in words is "four hundred million, nine hundred twelve thousand, eight hundred thirty-six".