39992225 has 24 divisors (see below), whose sum is σ = 61037760. Its totient is φ = 25312320.

The previous prime is 39992221. The next prime is 39992231. The reversal of 39992225 is 52229993.

It is not a de Polignac number, because 39992225 - 2² = 39992221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39992221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6515 + ... + 11064.

It is an arithmetic number, because the mean of its divisors is an integer number (2543240).

Almost surely, 2^39992225 is an apocalyptic number.

39992225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39992225 is a deficient number, since it is larger than the sum of its proper divisors (21045535).

39992225 is a wasteful number, since it uses less digits than its factorization.

39992225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17609 (or 17604 counting only the distinct ones).

The product of its digits is 87480, while the sum is 41.

The square root of 39992225 is about 6323.9406227447. The cubic root of 39992225 is about 341.9730294612.

The spelling of 39992225 in words is "thirty-nine million, nine hundred ninety-two thousand, two hundred twenty-five".