68889015 has 64 divisors (see below), whose sum is σ = 139708800. Its totient is φ = 31905792.

The previous prime is 68888999. The next prime is 68889019. The reversal of 68889015 is 51098886.

It is not a de Polignac number, because 68889015 - 2⁴ = 68888999 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68889019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28681 + ... + 30989.

It is an arithmetic number, because the mean of its divisors is an integer number (2182950).

Almost surely, 2^68889015 is an apocalyptic number.

68889015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68889015 is an abundant number, since it is smaller than the sum of its proper divisors (70819785).

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

68889015 is a wasteful number, since it uses less digits than its factorization.

68889015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 68889015 is about 8299.9406624385. The cubic root of 68889015 is about 409.9365656372.

The spelling of 68889015 in words is "sixty-eight million, eight hundred eighty-nine thousand, fifteen".