402274312 has 64 divisors (see below), whose sum is σ = 855748800. Its totient is φ = 175607040.

The previous prime is 402274307. The next prime is 402274319. The reversal of 402274312 is 213472204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (402274319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721938 + ... + 722494.

It is an arithmetic number, because the mean of its divisors is an integer number (13371075).

Almost surely, 2^402274312 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 402274312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427874400).

402274312 is an abundant number, since it is smaller than the sum of its proper divisors (453474488).

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

402274312 is a wasteful number, since it uses less digits than its factorization.

402274312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 402274312 is about 20056.7772087143. Note that the first 3 decimals coincide. The cubic root of 402274312 is about 738.2001009482.

The spelling of 402274312 in words is "four hundred two million, two hundred seventy-four thousand, three hundred twelve".