400920416 has 24 divisors (see below), whose sum is σ = 850029264. Its totient is φ = 185040000.

The previous prime is 400920379. The next prime is 400920437. The reversal of 400920416 is 614029004.

It is a super-2 number, since 2×400920416² = 321474359931226112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 481460 + ... + 482291.

It is an arithmetic number, because the mean of its divisors is an integer number (35417886).

Almost surely, 2^400920416 is an apocalyptic number.

It is an amenable number.

400920416 is an abundant number, since it is smaller than the sum of its proper divisors (449108848).

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

400920416 is a wasteful number, since it uses less digits than its factorization.

400920416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963774 (or 963766 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 400920416 is about 20022.9971782448. The cubic root of 400920416 is about 737.3710070672.

The spelling of 400920416 in words is "four hundred million, nine hundred twenty thousand, four hundred sixteen".