39898172 has 12 divisors (see below), whose sum is σ = 69877080. Its totient is φ = 19933296.

The previous prime is 39898151. The next prime is 39898211. The reversal of 39898172 is 27189893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3158 + ... + 9474.

It is an arithmetic number, because the mean of its divisors is an integer number (5823090).

Almost surely, 2^39898172 is an apocalyptic number.

It is a pronic number, being equal to 6316×6317.

It is an amenable number.

39898172 is a deficient number, since it is larger than the sum of its proper divisors (29978908).

39898172 is a wasteful number, since it uses less digits than its factorization.

39898172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900 (or 7898 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 39898172 is about 6316.4999802106. The cubic root of 39898172 is about 341.7047370097.

The spelling of 39898172 in words is "thirty-nine million, eight hundred ninety-eight thousand, one hundred seventy-two".