400447516 has 24 divisors (see below), whose sum is σ = 801325280. Its totient is φ = 171528192.

The previous prime is 400447447. The next prime is 400447517. The reversal of 400447516 is 615744004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400447517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86476 + ... + 90988.

Almost surely, 2^400447516 is an apocalyptic number.

It is an amenable number.

400447516 is an abundant number, since it is smaller than the sum of its proper divisors (400877764).

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

400447516 is a wasteful number, since it uses less digits than its factorization.

400447516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693 (or 7691 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 400447516 is about 20011.1847725216. The cubic root of 400447516 is about 737.0809744924.

The spelling of 400447516 in words is "four hundred million, four hundred forty-seven thousand, five hundred sixteen".