402184020 has 192 divisors, whose sum is σ = 1370880000. Its totient is φ = 86054400.

The previous prime is 402183983. The next prime is 402184037. The reversal of 402184020 is 20481204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 805731 + ... + 806229.

It is an arithmetic number, because the mean of its divisors is an integer number (7140000).

Almost surely, 2^402184020 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 402184020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685440000).

402184020 is an abundant number, since it is smaller than the sum of its proper divisors (968695980).

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

402184020 is a wasteful number, since it uses less digits than its factorization.

402184020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 402184020 is about 20054.5261724130. The cubic root of 402184020 is about 738.1448662083.

The spelling of 402184020 in words is "four hundred two million, one hundred eighty-four thousand, twenty".