400358016 has 48 divisors (see below), whose sum is σ = 1152075210. Its totient is φ = 133452288.

The previous prime is 400358009. The next prime is 400358027. The reversal of 400358016 is 610853004.

It can be written as a sum of positive squares in only one way, i.e., 388247616 + 12110400 = 19704^2 + 3480^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172615 + ... + 174918.

Almost surely, 2^400358016 is an apocalyptic number.

It is an amenable number.

400358016 is an abundant number, since it is smaller than the sum of its proper divisors (751717194).

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

400358016 is a wasteful number, since it uses less digits than its factorization.

400358016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347553 (or 347538 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 400358016 is about 20008.9483981543. The cubic root of 400358016 is about 737.0260578805.

The spelling of 400358016 in words is "four hundred million, three hundred fifty-eight thousand, sixteen".