39972966 has 32 divisors (see below), whose sum is σ = 88276608. Its totient is φ = 11965440.

The previous prime is 39972949. The next prime is 39972997. The reversal of 39972966 is 66927993.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830 + ... + 9126.

It is an arithmetic number, because the mean of its divisors is an integer number (2758644).

Almost surely, 2^39972966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39972966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44138304).

39972966 is an abundant number, since it is smaller than the sum of its proper divisors (48303642).

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

39972966 is a wasteful number, since it uses less digits than its factorization.

39972966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its digits is 1102248, while the sum is 51.

The square root of 39972966 is about 6322.4177337471. The cubic root of 39972966 is about 341.9181261554.

The spelling of 39972966 in words is "thirty-nine million, nine hundred seventy-two thousand, nine hundred sixty-six".