39742678 has 8 divisors (see below), whose sum is σ = 59640840. Its totient is φ = 19862400.

The previous prime is 39742657. The next prime is 39742679. The reversal of 39742678 is 87624793.

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

It is a super-2 number, since 2×39742678² = 3158960909223368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39742679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5878 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (7455105).

Almost surely, 2^39742678 is an apocalyptic number.

39742678 is a deficient number, since it is larger than the sum of its proper divisors (19898162).

39742678 is a wasteful number, since it uses less digits than its factorization.

39742678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8942.

The product of its digits is 508032, while the sum is 46.

The square root of 39742678 is about 6304.1794073456. The cubic root of 39742678 is about 341.2602537317.

The spelling of 39742678 in words is "thirty-nine million, seven hundred forty-two thousand, six hundred seventy-eight".