402144831 has 84 divisors (see below), whose sum is σ = 683815776. Its totient is φ = 236079360.

The previous prime is 402144817. The next prime is 402144833. The reversal of 402144831 is 138441204.

It is not a de Polignac number, because 402144831 - 2⁷ = 402144703 is a prime.

It is a super-2 number, since 2×402144831² = 323440930200037122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 402144795 and 402144804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144833) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 4145775 + ... + 4145871.

It is an arithmetic number, because the mean of its divisors is an integer number (8140664).

Almost surely, 2^402144831 is an apocalyptic number.

402144831 is a deficient number, since it is larger than the sum of its proper divisors (281670945).

402144831 is an equidigital number, since it uses as much as digits as its factorization.

402144831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 402144831 is about 20053.5490873810. The cubic root of 402144831 is about 738.1208903686.

The spelling of 402144831 in words is "four hundred two million, one hundred forty-four thousand, eight hundred thirty-one".