39927945 has 8 divisors (see below), whose sum is σ = 63884736. Its totient is φ = 21294896.

The previous prime is 39927941. The next prime is 39927961. The reversal of 39927945 is 54972993.

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

It is a cyclic number.

It is not a de Polignac number, because 39927945 - 2² = 39927941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39927894 and 39927903.

It is not an unprimeable number, because it can be changed into a prime (39927941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330917 + ... + 1330946.

It is an arithmetic number, because the mean of its divisors is an integer number (7985592).

Almost surely, 2^39927945 is an apocalyptic number.

It is an amenable number.

39927945 is a deficient number, since it is larger than the sum of its proper divisors (23956791).

39927945 is a wasteful number, since it uses less digits than its factorization.

39927945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661871.

The product of its digits is 612360, while the sum is 48.

The square root of 39927945 is about 6318.8563047438. The cubic root of 39927945 is about 341.7897120440.

The spelling of 39927945 in words is "thirty-nine million, nine hundred twenty-seven thousand, nine hundred forty-five".