68442520 has 32 divisors (see below), whose sum is σ = 154256400. Its totient is φ = 27330688.

The previous prime is 68442499. The next prime is 68442533. The reversal of 68442520 is 2524486.

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, 32046 + ... + 34114.

Almost surely, 2^68442520 is an apocalyptic number.

It is an amenable number.

68442520 is an abundant number, since it is smaller than the sum of its proper divisors (85813880).

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

68442520 is a wasteful number, since it uses less digits than its factorization.

68442520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 68442520 is about 8272.9994560619. Note that the first 3 decimals coincide. The cubic root of 68442520 is about 409.0489955113.

The spelling of 68442520 in words is "sixty-eight million, four hundred forty-two thousand, five hundred twenty".