402213924 has 120 divisors (see below), whose sum is σ = 1213446080. Its totient is φ = 113793984.

The previous prime is 402213923. The next prime is 402213937. The reversal of 402213924 is 429312204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (402213923) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 246399 + ... + 248025.

Almost surely, 2^402213924 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 402213924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606723040).

402213924 is an abundant number, since it is smaller than the sum of its proper divisors (811232156).

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

402213924 is a wasteful number, since it uses less digits than its factorization.

402213924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 402213924 is about 20055.2717259079. The cubic root of 402213924 is about 738.1631604351.

The spelling of 402213924 in words is "four hundred two million, two hundred thirteen thousand, nine hundred twenty-four".