68490730 has 96 divisors (see below), whose sum is σ = 159268032. Its totient is φ = 20966400.

The previous prime is 68490727. The next prime is 68490767. The reversal of 68490730 is 3709486.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68490730.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522765 + ... + 522895.

It is an arithmetic number, because the mean of its divisors is an integer number (1659042).

Almost surely, 2^68490730 is an apocalyptic number.

68490730 is an abundant number, since it is smaller than the sum of its proper divisors (90777302).

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

68490730 is a wasteful number, since it uses less digits than its factorization.

68490730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 68490730 is about 8275.9126384949. The cubic root of 68490730 is about 409.1450158588.

The spelling of 68490730 in words is "sixty-eight million, four hundred ninety thousand, seven hundred thirty".