402102140 has 24 divisors (see below), whose sum is σ = 921179952. Its totient is φ = 146218880.

The previous prime is 402102133. The next prime is 402102157. The reversal of 402102140 is 41201204.

It is a super-2 number, since 2×402102140² = 323372261985159200, which contains 22 as substring.

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, 913649 + ... + 914088.

It is an arithmetic number, because the mean of its divisors is an integer number (38382498).

Almost surely, 2^402102140 is an apocalyptic number.

It is an amenable number.

402102140 is an abundant number, since it is smaller than the sum of its proper divisors (519077812).

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

402102140 is a wasteful number, since it uses less digits than its factorization.

402102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827757 (or 1827755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 402102140 is about 20052.4846340796. The cubic root of 402102140 is about 738.0947702318.

Adding to 402102140 its reverse (41201204), we get a palindrome (443303344).

The spelling of 402102140 in words is "four hundred two million, one hundred two thousand, one hundred forty".