68907930 has 128 divisors (see below), whose sum is σ = 208631808. Its totient is φ = 14176512.

The previous prime is 68907913. The next prime is 68907941. The reversal of 68907930 is 3970986.

It is a happy number.

68907930 is a nontrivial binomial coefficient, being equal to C(11740, 2).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117097 + ... + 117683.

It is an arithmetic number, because the mean of its divisors is an integer number (1629936).

Almost surely, 2^68907930 is an apocalyptic number.

68907930 is the 11739-th triangular number and also the 5870-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68907930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104315904).

68907930 is an abundant number, since it is smaller than the sum of its proper divisors (139723878).

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

68907930 is a wasteful number, since it uses less digits than its factorization.

68907930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 68907930 is about 8301.0800502103. The cubic root of 68907930 is about 409.9740812487.

The spelling of 68907930 in words is "sixty-eight million, nine hundred seven thousand, nine hundred thirty".