68942740 has 24 divisors (see below), whose sum is σ = 145421640. Its totient is φ = 27454848.

The previous prime is 68942737. The next prime is 68942759. The reversal of 68942740 is 4724986.

It can be written as a sum of positive squares in 4 ways, for example, as 40170244 + 28772496 = 6338^2 + 5364^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68942693 and 68942702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947 + ... + 12106.

It is an arithmetic number, because the mean of its divisors is an integer number (6059235).

Almost surely, 2^68942740 is an apocalyptic number.

It is an amenable number.

68942740 is an abundant number, since it is smaller than the sum of its proper divisors (76478900).

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

68942740 is a wasteful number, since it uses less digits than its factorization.

68942740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291 (or 15289 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 68942740 is about 8303.1765005930. The cubic root of 68942740 is about 410.0431047285.

The spelling of 68942740 in words is "sixty-eight million, nine hundred forty-two thousand, seven hundred forty".