400606530 has 32 divisors (see below), whose sum is σ = 1018013184. Its totient is φ = 100544256.

The previous prime is 400606523. The next prime is 400606537. The reversal of 400606530 is 35606004.

It is an interprime number because it is at equal distance from previous prime (400606523) and next prime (400606537).

It is a self number, because there is not a number n which added to its sum of digits gives 400606530.

It is not an unprimeable number, because it can be changed into a prime (400606537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392242 + ... + 393261.

It is an arithmetic number, because the mean of its divisors is an integer number (31812912).

Almost surely, 2^400606530 is an apocalyptic number.

400606530 is an abundant number, since it is smaller than the sum of its proper divisors (617406654).

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

400606530 is a wasteful number, since it uses less digits than its factorization.

400606530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785530.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 400606530 is about 20015.1575062501. The cubic root of 400606530 is about 737.1785242578.

The spelling of 400606530 in words is "four hundred million, six hundred six thousand, five hundred thirty".