402311252 has 24 divisors (see below), whose sum is σ = 805689024. Its totient is φ = 172190592.

The previous prime is 402311251. The next prime is 402311269. The reversal of 402311252 is 252113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402311251) 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, 12908 + ... + 31164.

It is an arithmetic number, because the mean of its divisors is an integer number (33570376).

Almost surely, 2^402311252 is an apocalyptic number.

It is an amenable number.

402311252 is an abundant number, since it is smaller than the sum of its proper divisors (403377772).

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

402311252 is a wasteful number, since it uses less digits than its factorization.

402311252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19055 (or 19053 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 402311252 is about 20057.6980733084. The cubic root of 402311252 is about 738.2226960417. Note that the first 3 decimals are identical.

Adding to 402311252 its reverse (252113204), we get a palindrome (654424456).

The spelling of 402311252 in words is "four hundred two million, three hundred eleven thousand, two hundred fifty-two".