68942578 has 4 divisors (see below), whose sum is σ = 103413870. Its totient is φ = 34471288.

The previous prime is 68942567. The next prime is 68942579. The reversal of 68942578 is 87524986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 2634129 = 8143^2 + 1623^2 .

It is a super-2 number, since 2×68942578² = 9506158122572168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68942579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17235643 + ... + 17235646.

Almost surely, 2^68942578 is an apocalyptic number.

68942578 is a deficient number, since it is larger than the sum of its proper divisors (34471292).

68942578 is a wasteful number, since it uses less digits than its factorization.

68942578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34471291.

The product of its digits is 967680, while the sum is 49.

The square root of 68942578 is about 8303.1667452846. The cubic root of 68942578 is about 410.0427835584.

The spelling of 68942578 in words is "sixty-eight million, nine hundred forty-two thousand, five hundred seventy-eight".