402685164 has 144 divisors (see below), whose sum is σ = 1264506880. Its totient is φ = 105442560.

The previous prime is 402685163. The next prime is 402685169. The reversal of 402685164 is 461586204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (402685163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147072 + ... + 149784.

Almost surely, 2^402685164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402685164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632253440).

402685164 is an abundant number, since it is smaller than the sum of its proper divisors (861821716).

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

402685164 is a wasteful number, since it uses less digits than its factorization.

402685164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780 (or 2775 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 402685164 is about 20067.0168186504. The cubic root of 402685164 is about 738.4513290155.

The spelling of 402685164 in words is "four hundred two million, six hundred eighty-five thousand, one hundred sixty-four".