400608816 has 40 divisors (see below), whose sum is σ = 1049092080. Its totient is φ = 131705856.

The previous prime is 400608811. The next prime is 400608823. The reversal of 400608816 is 618806004.

It is not an unprimeable number, because it can be changed into a prime (400608811) 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, 53661 + ... + 60668.

It is an arithmetic number, because the mean of its divisors is an integer number (26227302).

Almost surely, 2^400608816 is an apocalyptic number.

It is an amenable number.

400608816 is an abundant number, since it is smaller than the sum of its proper divisors (648483264).

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

400608816 is a wasteful number, since it uses less digits than its factorization.

400608816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114413 (or 114407 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 400608816 is about 20015.2146128889. The cubic root of 400608816 is about 737.1799264540.

The spelling of 400608816 in words is "four hundred million, six hundred eight thousand, eight hundred sixteen".