68920438 has 8 divisors (see below), whose sum is σ = 103481280. Its totient is φ = 34426680.

The previous prime is 68920433. The next prime is 68920441. The reversal of 68920438 is 83402986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×68920438² = 9500053548223688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68920438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68920433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14118 + ... + 18361.

It is an arithmetic number, because the mean of its divisors is an integer number (12935160).

Almost surely, 2^68920438 is an apocalyptic number.

68920438 is a deficient number, since it is larger than the sum of its proper divisors (34560842).

68920438 is a wasteful number, since it uses less digits than its factorization.

68920438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33542.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 68920438 is about 8301.8334119639. The cubic root of 68920438 is about 409.9988855809.

The spelling of 68920438 in words is "sixty-eight million, nine hundred twenty thousand, four hundred thirty-eight".