402020220 has 96 divisors (see below), whose sum is σ = 1342430208. Its totient is φ = 87892992.

The previous prime is 402020173. The next prime is 402020239. The reversal of 402020220 is 22020204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 402020196 and 402020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11149 + ... + 30468.

It is an arithmetic number, because the mean of its divisors is an integer number (13983648).

Almost surely, 2^402020220 is an apocalyptic number.

It is an amenable number.

402020220 is an abundant number, since it is smaller than the sum of its proper divisors (940409988).

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

402020220 is a wasteful number, since it uses less digits than its factorization.

402020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41659 (or 41657 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 402020220 is about 20050.4418903923. The cubic root of 402020220 is about 738.0446429762.

Adding to 402020220 its reverse (22020204), we get a palindrome (424040424).

The spelling of 402020220 in words is "four hundred two million, twenty thousand, two hundred twenty".