402867680 has 48 divisors (see below), whose sum is σ = 958774320. Its totient is φ = 159962112.

The previous prime is 402867679. The next prime is 402867727. The reversal of 402867680 is 86768204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12731 + ... + 31109.

It is an arithmetic number, because the mean of its divisors is an integer number (19974465).

Almost surely, 2^402867680 is an apocalyptic number.

402867680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402867680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479387160).

402867680 is an abundant number, since it is smaller than the sum of its proper divisors (555906640).

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

402867680 is a wasteful number, since it uses less digits than its factorization.

402867680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18531 (or 18523 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 402867680 is about 20071.5639649729. The cubic root of 402867680 is about 738.5628792100.

The spelling of 402867680 in words is "four hundred two million, eight hundred sixty-seven thousand, six hundred eighty".