402389276 has 24 divisors (see below), whose sum is σ = 716308320. Its totient is φ = 197759232.

The previous prime is 402389261. The next prime is 402389279. The reversal of 402389276 is 672983204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402389279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52880 + ... + 60008.

It is an arithmetic number, because the mean of its divisors is an integer number (29846180).

Almost surely, 2^402389276 is an apocalyptic number.

It is an amenable number.

402389276 is a deficient number, since it is larger than the sum of its proper divisors (313919044).

402389276 is a wasteful number, since it uses less digits than its factorization.

402389276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373 (or 7371 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 402389276 is about 20059.6429679095. The cubic root of 402389276 is about 738.2704164441.

The spelling of 402389276 in words is "four hundred two million, three hundred eighty-nine thousand, two hundred seventy-six".