68888420 has 24 divisors (see below), whose sum is σ = 153176184. Its totient is φ = 25934336.

The previous prime is 68888387. The next prime is 68888429. The reversal of 68888420 is 2488886.

It can be written as a sum of positive squares in 4 ways, for example, as 14807104 + 54081316 = 3848^2 + 7354^2 .

It is a super-2 number, since 2×68888420² = 9491228820192800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68888429) 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, 100967 + ... + 101646.

It is an arithmetic number, because the mean of its divisors is an integer number (6382341).

Almost surely, 2^68888420 is an apocalyptic number.

It is an amenable number.

68888420 is an abundant number, since it is smaller than the sum of its proper divisors (84287764).

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

68888420 is a wasteful number, since it uses less digits than its factorization.

68888420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202639 (or 202637 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 68888420 is about 8299.9048187314. The cubic root of 68888420 is about 409.9353854154.

The spelling of 68888420 in words is "sixty-eight million, eight hundred eighty-eight thousand, four hundred twenty".