640000368 has 90 divisors (see below), whose sum is σ = 2083561584. Its totient is φ = 182855232.

The previous prime is 640000357. The next prime is 640000373. The reversal of 640000368 is 863000046.

It is a super-3 number, since 3×640000368³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38296 + ... + 52407.

Almost surely, 2^640000368 is an apocalyptic number.

It is an amenable number.

640000368 is an abundant number, since it is smaller than the sum of its proper divisors (1443561216).

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

640000368 is a wasteful number, since it uses less digits than its factorization.

640000368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90731 (or 90715 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 640000368 is about 25298.2285545846. The cubic root of 640000368 is about 861.7740411860.

The spelling of 640000368 in words is "six hundred forty million, three hundred sixty-eight", and thus it is an aban number.