402143024 has 20 divisors (see below), whose sum is σ = 824985144. Its totient is φ = 189243648.

The previous prime is 402143023. The next prime is 402143033. The reversal of 402143024 is 420341204.

It is a junction number, because it is equal to n+sod(n) for n = 402142987 and 402143005.

It is not an unprimeable number, because it can be changed into a prime (402143023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738962 + ... + 739505.

Almost surely, 2^402143024 is an apocalyptic number.

It is an amenable number.

402143024 is an abundant number, since it is smaller than the sum of its proper divisors (422842120).

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

402143024 is a wasteful number, since it uses less digits than its factorization.

402143024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478492 (or 1478486 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402143024 is about 20053.5040329614. The cubic root of 402143024 is about 738.1197848080.

Adding to 402143024 its reverse (420341204), we get a palindrome (822484228).

The spelling of 402143024 in words is "four hundred two million, one hundred forty-three thousand, twenty-four".