39946975 has 12 divisors (see below), whose sum is σ = 51688656. Its totient is φ = 30567680.

The previous prime is 39946967. The next prime is 39946981. The reversal of 39946975 is 57964993.

It is not a de Polignac number, because 39946975 - 2³ = 39946967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34162 + ... + 35311.

It is an arithmetic number, because the mean of its divisors is an integer number (4307388).

Almost surely, 2^39946975 is an apocalyptic number.

39946975 is a deficient number, since it is larger than the sum of its proper divisors (11741681).

39946975 is a wasteful number, since it uses less digits than its factorization.

39946975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69506 (or 69501 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 52.

The square root of 39946975 is about 6320.3619358388. The cubic root of 39946975 is about 341.8440033861.

It can be divided in two parts, 399 and 46975, that added together give a palindrome (47374).

The spelling of 39946975 in words is "thirty-nine million, nine hundred forty-six thousand, nine hundred seventy-five".