402452020 has 12 divisors (see below), whose sum is σ = 845149284. Its totient is φ = 160980800.

The previous prime is 402451963. The next prime is 402452051. The reversal of 402452020 is 20254204.

It can be written as a sum of positive squares in 2 ways, for example, as 168117156 + 234334864 = 12966^2 + 15308^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10061281 + ... + 10061320.

It is an arithmetic number, because the mean of its divisors is an integer number (70429107).

Almost surely, 2^402452020 is an apocalyptic number.

It is an amenable number.

402452020 is an abundant number, since it is smaller than the sum of its proper divisors (442697264).

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

402452020 is a wasteful number, since it uses less digits than its factorization.

402452020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122610 (or 20122608 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 402452020 is about 20061.2068430591. The cubic root of 402452020 is about 738.3087869428.

The spelling of 402452020 in words is "four hundred two million, four hundred fifty-two thousand, twenty".