402288620 has 24 divisors (see below), whose sum is σ = 845208000. Its totient is φ = 160838912.

The previous prime is 402288617. The next prime is 402288631. The reversal of 402288620 is 26882204.

It is a happy number.

It is a super-2 number, since 2×402288620² = 323672267563008800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59156 + ... + 65604.

It is an arithmetic number, because the mean of its divisors is an integer number (35217000).

Almost surely, 2^402288620 is an apocalyptic number.

It is an amenable number.

402288620 is an abundant number, since it is smaller than the sum of its proper divisors (442919380).

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

402288620 is a wasteful number, since it uses less digits than its factorization.

402288620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577 (or 9575 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 402288620 is about 20057.1338929569. The cubic root of 402288620 is about 738.2088528882.

The spelling of 402288620 in words is "four hundred two million, two hundred eighty-eight thousand, six hundred twenty".