402532140 has 24 divisors (see below), whose sum is σ = 1127090160. Its totient is φ = 107341888.

The previous prime is 402532133. The next prime is 402532153. The reversal of 402532140 is 41235204.

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, 3354375 + ... + 3354494.

It is an arithmetic number, because the mean of its divisors is an integer number (46962090).

Almost surely, 2^402532140 is an apocalyptic number.

It is an amenable number.

402532140 is an abundant number, since it is smaller than the sum of its proper divisors (724558020).

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

402532140 is a wasteful number, since it uses less digits than its factorization.

402532140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708881 (or 6708879 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 402532140 is about 20063.2036325209. The cubic root of 402532140 is about 738.3577777724.

Adding to 402532140 its reverse (41235204), we get a palindrome (443767344).

The spelling of 402532140 in words is "four hundred two million, five hundred thirty-two thousand, one hundred forty".