400434478 has 16 divisors (see below), whose sum is σ = 611921664. Its totient is φ = 196483320.

The previous prime is 400434469. The next prime is 400434479. The reversal of 400434478 is 874434004.

It is a super-2 number, since 2×400434478² = 320695542342264968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400434479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30801 + ... + 41827.

It is an arithmetic number, because the mean of its divisors is an integer number (38245104).

Almost surely, 2^400434478 is an apocalyptic number.

400434478 is a deficient number, since it is larger than the sum of its proper divisors (211487186).

400434478 is a wasteful number, since it uses less digits than its factorization.

400434478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11367.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 400434478 is about 20010.8590020519. The cubic root of 400434478 is about 737.0729749705.

It can be divided in two parts, 40043 and 4478, that added together give a square (44521 = 211²).

The spelling of 400434478 in words is "four hundred million, four hundred thirty-four thousand, four hundred seventy-eight".