400872068 has 12 divisors (see below), whose sum is σ = 701690892. Its totient is φ = 200388960.

The previous prime is 400872061. The next prime is 400872079. The reversal of 400872068 is 860278004.

It can be written as a sum of positive squares in 2 ways, for example, as 310393924 + 90478144 = 17618^2 + 9512^2 .

It is not an unprimeable number, because it can be changed into a prime (400872061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13346 + ... + 31302.

It is an arithmetic number, because the mean of its divisors is an integer number (58474241).

Almost surely, 2^400872068 is an apocalyptic number.

It is an amenable number.

400872068 is a deficient number, since it is larger than the sum of its proper divisors (300818824).

400872068 is a wasteful number, since it uses less digits than its factorization.

400872068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23542 (or 23540 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 400872068 is about 20021.7898300826. The cubic root of 400872068 is about 737.3413654017.

The spelling of 400872068 in words is "four hundred million, eight hundred seventy-two thousand, sixty-eight".