39690678 has 8 divisors (see below), whose sum is σ = 79381368. Its totient is φ = 13230224.

The previous prime is 39690671. The next prime is 39690689. The reversal of 39690678 is 87609693.

It is a happy number.

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

39690678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39690671) 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, 3307551 + ... + 3307562.

It is an arithmetic number, because the mean of its divisors is an integer number (9922671).

Almost surely, 2^39690678 is an apocalyptic number.

39690678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

39690678 is a wasteful number, since it uses less digits than its factorization.

39690678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615118.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 39690678 is about 6300.0538092940. The cubic root of 39690678 is about 341.1113518523. Note that the first 3 decimals are identical.

The spelling of 39690678 in words is "thirty-nine million, six hundred ninety thousand, six hundred seventy-eight".