402020970 has 32 divisors (see below), whose sum is σ = 1039070592. Its totient is φ = 98958912.

The previous prime is 402020959. The next prime is 402020977. The reversal of 402020970 is 79020204.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402020970.

It is not an unprimeable number, because it can be changed into a prime (402020977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515022 + ... + 515801.

It is an arithmetic number, because the mean of its divisors is an integer number (32470956).

Almost surely, 2^402020970 is an apocalyptic number.

402020970 is an abundant number, since it is smaller than the sum of its proper divisors (637049622).

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

402020970 is a wasteful number, since it uses less digits than its factorization.

402020970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030846.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 402020970 is about 20050.4605932133. The cubic root of 402020970 is about 738.0451019358.

The spelling of 402020970 in words is "four hundred two million, twenty thousand, nine hundred seventy".