68722440 has 32 divisors (see below), whose sum is σ = 206167680. Its totient is φ = 18325952.

The previous prime is 68722439. The next prime is 68722441. The reversal of 68722440 is 4422786.

It is an interprime number because it is at equal distance from previous prime (68722439) and next prime (68722441).

It is not an unprimeable number, because it can be changed into a prime (68722441) 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, 286224 + ... + 286463.

It is an arithmetic number, because the mean of its divisors is an integer number (6442740).

Almost surely, 2^68722440 is an apocalyptic number.

68722440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68722440 is an abundant number, since it is smaller than the sum of its proper divisors (137445240).

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

68722440 is a wasteful number, since it uses less digits than its factorization.

68722440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572701 (or 572697 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 68722440 is about 8289.8998787681. The cubic root of 68722440 is about 409.6058873920.

The spelling of 68722440 in words is "sixty-eight million, seven hundred twenty-two thousand, four hundred forty".