402272660 has 12 divisors (see below), whose sum is σ = 844772628. Its totient is φ = 160909056.

The previous prime is 402272609. The next prime is 402272669. The reversal of 402272660 is 66272204.

It can be written as a sum of positive squares in 2 ways, for example, as 218507524 + 183765136 = 14782^2 + 13556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402272669) 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, 10056797 + ... + 10056836.

It is an arithmetic number, because the mean of its divisors is an integer number (70397719).

Almost surely, 2^402272660 is an apocalyptic number.

It is an amenable number.

402272660 is an abundant number, since it is smaller than the sum of its proper divisors (442499968).

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

402272660 is a wasteful number, since it uses less digits than its factorization.

402272660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20113642 (or 20113640 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 402272660 is about 20056.7360255850. The cubic root of 402272660 is about 738.1990904369.

The spelling of 402272660 in words is "four hundred two million, two hundred seventy-two thousand, six hundred sixty".