402647652 has 96 divisors (see below), whose sum is σ = 1205850240. Its totient is φ = 114831360.

The previous prime is 402647647. The next prime is 402647681. The reversal of 402647652 is 256746204.

402647652 is a `hidden beast` number, since 4 + 0 + 2 + 647 + 6 + 5 + 2 = 666.

It is a super-2 number, since 2×402647652² = 324250263322226208, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10228 + ... + 30164.

It is an arithmetic number, because the mean of its divisors is an integer number (12560940).

Almost surely, 2^402647652 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 402647652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602925120).

402647652 is an abundant number, since it is smaller than the sum of its proper divisors (803202588).

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

402647652 is a wasteful number, since it uses less digits than its factorization.

402647652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19978 (or 19970 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 402647652 is about 20066.0821288063. The cubic root of 402647652 is about 738.4283982423.

The spelling of 402647652 in words is "four hundred two million, six hundred forty-seven thousand, six hundred fifty-two".