68401988 has 12 divisors (see below), whose sum is σ = 119762832. Its totient is φ = 34184040.

The previous prime is 68401987. The next prime is 68402029. The reversal of 68401988 is 88910486.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68401987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10643 + ... + 15813.

It is an arithmetic number, because the mean of its divisors is an integer number (9980236).

Almost surely, 2^68401988 is an apocalyptic number.

It is an amenable number.

68401988 is a deficient number, since it is larger than the sum of its proper divisors (51360844).

68401988 is a wasteful number, since it uses less digits than its factorization.

68401988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482 (or 8480 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 68401988 is about 8270.5494376130. The cubic root of 68401988 is about 408.9682326181.

The spelling of 68401988 in words is "sixty-eight million, four hundred one thousand, nine hundred eighty-eight".