402009752 has 32 divisors (see below), whose sum is σ = 811905600. Its totient is φ = 185994144.

The previous prime is 402009731. The next prime is 402009763. The reversal of 402009752 is 257900204.

It is a super-2 number, since 2×402009752² = 323223681406203008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24218 + ... + 37289.

It is an arithmetic number, because the mean of its divisors is an integer number (25372050).

Almost surely, 2^402009752 is an apocalyptic number.

It is an amenable number.

402009752 is an abundant number, since it is smaller than the sum of its proper divisors (409895848).

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

402009752 is a wasteful number, since it uses less digits than its factorization.

402009752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61575 (or 61571 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 402009752 is about 20050.1808470647. The cubic root of 402009752 is about 738.0382370643.

Adding to 402009752 its reverse (257900204), we get a palindrome (659909956).

The spelling of 402009752 in words is "four hundred two million, nine thousand, seven hundred fifty-two".