68736690 has 48 divisors (see below), whose sum is σ = 194965056. Its totient is φ = 16663200.

The previous prime is 68736683. The next prime is 68736697. The reversal of 68736690 is 9663786.

It is an interprime number because it is at equal distance from previous prime (68736683) and next prime (68736697).

It is a super-2 number, since 2×68736690² = 9449465104312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (68736697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33726 + ... + 35705.

It is an arithmetic number, because the mean of its divisors is an integer number (4061772).

Almost surely, 2^68736690 is an apocalyptic number.

68736690 is an abundant number, since it is smaller than the sum of its proper divisors (126228366).

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

68736690 is a wasteful number, since it uses less digits than its factorization.

68736690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69455 (or 69452 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 68736690 is about 8290.7593138385. The cubic root of 68736690 is about 409.6341968278.

The spelling of 68736690 in words is "sixty-eight million, seven hundred thirty-six thousand, six hundred ninety".