68257722 has 32 divisors (see below), whose sum is σ = 151764480. Its totient is φ = 20324160.

The previous prime is 68257667. The next prime is 68257723. The reversal of 68257722 is 22775286.

It is a super-2 number, since 2×68257722² = 9318233225258568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (68257723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11697 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (4742640).

Almost surely, 2^68257722 is an apocalyptic number.

68257722 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

68257722 is an abundant number, since it is smaller than the sum of its proper divisors (83506758).

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

68257722 is a wasteful number, since it uses less digits than its factorization.

68257722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28278.

The product of its digits is 94080, while the sum is 39.

The square root of 68257722 is about 8261.8231644111. The cubic root of 68257722 is about 408.6805132093.

The spelling of 68257722 in words is "sixty-eight million, two hundred fifty-seven thousand, seven hundred twenty-two".