68640276 has 24 divisors (see below), whose sum is σ = 160302240. Its totient is φ = 22859872.

The previous prime is 68640269. The next prime is 68640281. The reversal of 68640276 is 67204686.

It is a super-2 number, since 2×68640276² = 9422974978712352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 18835 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (6679260).

Almost surely, 2^68640276 is an apocalyptic number.

It is an amenable number.

68640276 is an abundant number, since it is smaller than the sum of its proper divisors (91661964).

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

68640276 is a wasteful number, since it uses less digits than its factorization.

68640276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 68640276 is about 8284.9427276234. The cubic root of 68640276 is about 409.4425817840.

The spelling of 68640276 in words is "sixty-eight million, six hundred forty thousand, two hundred seventy-six".