68421748 has 18 divisors (see below), whose sum is σ = 121759638. Its totient is φ = 33642720.

The previous prime is 68421733. The next prime is 68421761. The reversal of 68421748 is 84712486.

It can be written as a sum of positive squares in 3 ways, for example, as 13927824 + 54493924 = 3732^2 + 7382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68421748.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12586 + ... + 17182.

Almost surely, 2^68421748 is an apocalyptic number.

It is an amenable number.

68421748 is a deficient number, since it is larger than the sum of its proper divisors (53337890).

68421748 is a wasteful number, since it uses less digits than its factorization.

68421748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723 (or 4660 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 68421748 is about 8271.7439515498. The cubic root of 68421748 is about 409.0076098081.

It can be divided in two parts, 68421 and 748, that added together give a square (69169 = 263²).

The spelling of 68421748 in words is "sixty-eight million, four hundred twenty-one thousand, seven hundred forty-eight".