402312012140 has 12 divisors (see below), whose sum is σ = 844855225536. Its totient is φ = 160924804848.

The previous prime is 402312012101. The next prime is 402312012163. The reversal of 402312012140 is 41210213204.

It is a super-2 number, since 2×402312012140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20115600607 = 402312012140 / (4 + 0 + 2 + 3 + 1 + 2 + 0 + 1 + 2 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10057800284 + ... + 10057800323.

It is an arithmetic number, because the mean of its divisors is an integer number (70404602128).

Almost surely, 2^402312012140 is an apocalyptic number.

It is an amenable number.

402312012140 is an abundant number, since it is smaller than the sum of its proper divisors (442543213396).

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

402312012140 is a wasteful number, since it uses less digits than its factorization.

402312012140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115600616 (or 20115600614 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 402312012140 its reverse (41210213204), we get a palindrome (443522225344).

The spelling of 402312012140 in words is "four hundred two billion, three hundred twelve million, twelve thousand, one hundred forty".