402563620 has 24 divisors (see below), whose sum is σ = 861336504. Its totient is φ = 157986816.

The previous prime is 402563597. The next prime is 402563627. The reversal of 402563620 is 26365204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51151104 + 351412516 = 7152^2 + 18746^2 .

It is not an unprimeable number, because it can be changed into a prime (402563627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188829 + ... + 190948.

It is an arithmetic number, because the mean of its divisors is an integer number (35889021).

Almost surely, 2^402563620 is an apocalyptic number.

It is an amenable number.

402563620 is an abundant number, since it is smaller than the sum of its proper divisors (458772884).

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

402563620 is a wasteful number, since it uses less digits than its factorization.

402563620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379839 (or 379837 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 402563620 is about 20063.9881379550. The cubic root of 402563620 is about 738.3770250115.

The spelling of 402563620 in words is "four hundred two million, five hundred sixty-three thousand, six hundred twenty".