402124280 has 32 divisors (see below), whose sum is σ = 909390240. Its totient is φ = 160030080.

The previous prime is 402124279. The next prime is 402124309. The reversal of 402124280 is 82421204.

It is a happy number.

It is a congruent number.

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, 17636 + ... + 33395.

It is an arithmetic number, because the mean of its divisors is an integer number (28418445).

Almost surely, 2^402124280 is an apocalyptic number.

402124280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402124280 is an abundant number, since it is smaller than the sum of its proper divisors (507265960).

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

402124280 is a wasteful number, since it uses less digits than its factorization.

402124280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51239 (or 51235 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 402124280 is about 20053.0366777703. The cubic root of 402124280 is about 738.1083166392.

Adding to 402124280 its reverse (82421204), we get a palindrome (484545484).

The spelling of 402124280 in words is "four hundred two million, one hundred twenty-four thousand, two hundred eighty".