400965720 has 64 divisors (see below), whose sum is σ = 1207249920. Its totient is φ = 106537344.

The previous prime is 400965679. The next prime is 400965767. The reversal of 400965720 is 27569004.

It is a congruent number.

It is an unprimeable number.

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, 28057 + ... + 39863.

It is an arithmetic number, because the mean of its divisors is an integer number (18863280).

Almost surely, 2^400965720 is an apocalyptic number.

400965720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400965720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603624960).

400965720 is an abundant number, since it is smaller than the sum of its proper divisors (806284200).

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

400965720 is a wasteful number, since it uses less digits than its factorization.

400965720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104 (or 12100 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 400965720 is about 20024.1284454530. The cubic root of 400965720 is about 737.3987803248.

The spelling of 400965720 in words is "four hundred million, nine hundred sixty-five thousand, seven hundred twenty".