402649522 has 48 divisors (see below), whose sum is σ = 710874360. Its totient is φ = 170311680.

The previous prime is 402649519. The next prime is 402649537. The reversal of 402649522 is 225946204.

It can be written as a sum of positive squares in 4 ways, for example, as 350101521 + 52548001 = 18711^2 + 7249^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398554 + ... + 399562.

Almost surely, 2^402649522 is an apocalyptic number.

402649522 is a deficient number, since it is larger than the sum of its proper divisors (308224838).

402649522 is a wasteful number, since it uses less digits than its factorization.

402649522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 402649522 is about 20066.1287247939. The cubic root of 402649522 is about 738.4295413915.

The spelling of 402649522 in words is "four hundred two million, six hundred forty-nine thousand, five hundred twenty-two".