402401682 has 24 divisors (see below), whose sum is σ = 904162896. Its totient is φ = 134133732.

The previous prime is 402401647. The next prime is 402401683. The reversal of 402401682 is 286104204.

It is a super-2 number, since 2×402401682² = 323854227352858248, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (402401683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413508 + ... + 414479.

It is an arithmetic number, because the mean of its divisors is an integer number (37673454).

Almost surely, 2^402401682 is an apocalyptic number.

402401682 is an abundant number, since it is smaller than the sum of its proper divisors (501761214).

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

402401682 is an equidigital number, since it uses as much as digits as its factorization.

402401682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828004 (or 827992 counting only the distinct ones).

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

The square root of 402401682 is about 20059.9521933628. The cubic root of 402401682 is about 738.2780035322.

Adding to 402401682 its reverse (286104204), we get a palindrome (688505886).

The spelling of 402401682 in words is "four hundred two million, four hundred one thousand, six hundred eighty-two".