39999722 has 8 divisors (see below), whose sum is σ = 68570976. Its totient is φ = 17142732.

The previous prime is 39999719. The next prime is 39999727. The reversal of 39999722 is 22799993.

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

It is not an unprimeable number, because it can be changed into a prime (39999727) 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, 1428548 + ... + 1428575.

It is an arithmetic number, because the mean of its divisors is an integer number (8571372).

Almost surely, 2^39999722 is an apocalyptic number.

39999722 is a deficient number, since it is larger than the sum of its proper divisors (28571254).

39999722 is a wasteful number, since it uses less digits than its factorization.

39999722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857132.

The product of its digits is 551124, while the sum is 50.

The square root of 39999722 is about 6324.5333424688. The cubic root of 39999722 is about 341.9943970446.

The spelling of 39999722 in words is "thirty-nine million, nine hundred ninety-nine thousand, seven hundred twenty-two".