68421700 has 18 divisors (see below), whose sum is σ = 148475306. Its totient is φ = 27368640.

The previous prime is 68421671. The next prime is 68421713. The reversal of 68421700 is 712486.

It can be written as a sum of positive squares in 3 ways, for example, as 15888196 + 52533504 = 3986^2 + 7248^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342009 + ... + 342208.

Almost surely, 2^68421700 is an apocalyptic number.

It is an amenable number.

68421700 is an abundant number, since it is smaller than the sum of its proper divisors (80053606).

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

68421700 is a wasteful number, since it uses less digits than its factorization.

68421700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684231 (or 684224 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 68421700 is about 8271.7410501055. The cubic root of 68421700 is about 409.0075141642.

The spelling of 68421700 in words is "sixty-eight million, four hundred twenty-one thousand, seven hundred".