402689304 has 96 divisors (see below), whose sum is σ = 1115858640. Its totient is φ = 131155200.

The previous prime is 402689303. The next prime is 402689327. The reversal of 402689304 is 403986204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402689303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1216419 + ... + 1216749.

Almost surely, 2^402689304 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 402689304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557929320).

402689304 is an abundant number, since it is smaller than the sum of its proper divisors (713169336).

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

402689304 is a wasteful number, since it uses less digits than its factorization.

402689304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 402689304 is about 20067.1199727315. The cubic root of 402689304 is about 738.4538596758.

The spelling of 402689304 in words is "four hundred two million, six hundred eighty-nine thousand, three hundred four".