400309572 has 192 divisors, whose sum is σ = 1119928320. Its totient is φ = 110246400.

The previous prime is 400309571. The next prime is 400309579. The reversal of 400309572 is 275903004.

It is not an unprimeable number, because it can be changed into a prime (400309571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6562422 + ... + 6562482.

It is an arithmetic number, because the mean of its divisors is an integer number (5832960).

Almost surely, 2^400309572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400309572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559964160).

400309572 is an abundant number, since it is smaller than the sum of its proper divisors (719618748).

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

400309572 is a wasteful number, since it uses less digits than its factorization.

400309572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 400309572 is about 20007.7378031601. The cubic root of 400309572 is about 736.9963295464.

The spelling of 400309572 in words is "four hundred million, three hundred nine thousand, five hundred seventy-two".