402621232 has 40 divisors (see below), whose sum is σ = 848285984. Its totient is φ = 184011264.

The previous prime is 402621227. The next prime is 402621253. The reversal of 402621232 is 232126204.

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, 12028 + ... + 30820.

Almost surely, 2^402621232 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 402621232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424142992).

402621232 is an abundant number, since it is smaller than the sum of its proper divisors (445664752).

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

402621232 is a wasteful number, since it uses less digits than its factorization.

402621232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18917 (or 18911 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 402621232 is about 20065.4237931821. The cubic root of 402621232 is about 738.4122470616.

Adding to 402621232 its reverse (232126204), we get a palindrome (634747436).

The spelling of 402621232 in words is "four hundred two million, six hundred twenty-one thousand, two hundred thirty-two".