400916 has 12 divisors (see below), whose sum is σ = 711732. Its totient is φ = 197568.

The previous prime is 400903. The next prime is 400927. The reversal of 400916 is 619004.

It can be written as a sum of positive squares in 2 ways, for example, as 336400 + 64516 = 580^2 + 254^2 .

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, 395 + ... + 978.

It is an arithmetic number, because the mean of its divisors is an integer number (59311).

2⁴⁰⁰⁹¹⁶ is an apocalyptic number.

It is an amenable number.

400916 is a deficient number, since it is larger than the sum of its proper divisors (310816).

400916 is a wasteful number, since it uses less digits than its factorization.

400916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 400916 is about 633.1792795094. The cubic root of 400916 is about 73.7368299762.

The spelling of 400916 in words is "four hundred thousand, nine hundred sixteen".