400350016 has 28 divisors (see below), whose sum is σ = 866668320. Its totient is φ = 181976960.

The previous prime is 400349993. The next prime is 400350019. The reversal of 400350016 is 610053004.

It is a super-2 number, since 2×400350016² = 320560270622400512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400349975 and 400350002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400350019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283636 + ... + 285043.

It is an arithmetic number, because the mean of its divisors is an integer number (30952440).

Almost surely, 2^400350016 is an apocalyptic number.

It is an amenable number.

400350016 is an abundant number, since it is smaller than the sum of its proper divisors (466318304).

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

400350016 is a wasteful number, since it uses less digits than its factorization.

400350016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568702 (or 568692 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 400350016 is about 20008.7484865996. The cubic root of 400350016 is about 737.0211487346.

The spelling of 400350016 in words is "four hundred million, three hundred fifty thousand, sixteen".