400609152 has 80 divisors (see below), whose sum is σ = 1192237200. Its totient is φ = 133532928.

The previous prime is 400609151. The next prime is 400609159. The reversal of 400609152 is 251906004.

400609152 is a `hidden beast` number, since 4 + 0 + 0 + 609 + 1 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400609151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8952 + ... + 29687.

It is an arithmetic number, because the mean of its divisors is an integer number (14902965).

Almost surely, 2^400609152 is an apocalyptic number.

It is an amenable number.

400609152 is an abundant number, since it is smaller than the sum of its proper divisors (791628048).

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

400609152 is an equidigital number, since it uses as much as digits as its factorization.

400609152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38665 (or 38644 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 400609152 is about 20015.2230065018. The cubic root of 400609152 is about 737.1801325506.

The spelling of 400609152 in words is "four hundred million, six hundred nine thousand, one hundred fifty-two".