68815020 has 24 divisors (see below), whose sum is σ = 192682224. Its totient is φ = 18350656.

The previous prime is 68815013. The next prime is 68815027. The reversal of 68815020 is 2051886.

It is an interprime number because it is at equal distance from previous prime (68815013) and next prime (68815027).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (68815027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573399 + ... + 573518.

It is an arithmetic number, because the mean of its divisors is an integer number (8028426).

Almost surely, 2^68815020 is an apocalyptic number.

68815020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68815020 is an abundant number, since it is smaller than the sum of its proper divisors (123867204).

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

68815020 is a wasteful number, since it uses less digits than its factorization.

68815020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146929 (or 1146927 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 68815020 is about 8295.4819028191. The cubic root of 68815020 is about 409.7897395035.

The spelling of 68815020 in words is "sixty-eight million, eight hundred fifteen thousand, twenty".