402525020 has 12 divisors (see below), whose sum is σ = 845302584. Its totient is φ = 161010000.

The previous prime is 402524989. The next prime is 402525029. The reversal of 402525020 is 20525204.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20126251 = 402525020 / (4 + 0 + 2 + 5 + 2 + 5 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 402524983 and 402525001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402525029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10063106 + ... + 10063145.

It is an arithmetic number, because the mean of its divisors is an integer number (70441882).

Almost surely, 2^402525020 is an apocalyptic number.

It is an amenable number.

402525020 is an abundant number, since it is smaller than the sum of its proper divisors (442777564).

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

402525020 is a wasteful number, since it uses less digits than its factorization.

402525020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20126260 (or 20126258 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 402525020 is about 20063.0261924765. The cubic root of 402525020 is about 738.3534243823.

The spelling of 402525020 in words is "four hundred two million, five hundred twenty-five thousand, twenty".