39949772 has 6 divisors (see below), whose sum is σ = 69912108. Its totient is φ = 19974884.

The previous prime is 39949739. The next prime is 39949829. The reversal of 39949772 is 27794993.

It is a self number, because there is not a number n which added to its sum of digits gives 39949772.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993718 + ... + 4993725.

It is an arithmetic number, because the mean of its divisors is an integer number (11652018).

Almost surely, 2^39949772 is an apocalyptic number.

It is an amenable number.

39949772 is a deficient number, since it is larger than the sum of its proper divisors (29962336).

39949772 is a wasteful number, since it uses less digits than its factorization.

39949772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9987447 (or 9987445 counting only the distinct ones).

The product of its digits is 857304, while the sum is 50.

The square root of 39949772 is about 6320.5832009396. The cubic root of 39949772 is about 341.8519815902.

The spelling of 39949772 in words is "thirty-nine million, nine hundred forty-nine thousand, seven hundred seventy-two".