39399871 has 12 divisors (see below), whose sum is σ = 46123032. Its totient is φ = 33557328.

The previous prime is 39399859. The next prime is 39399887. The reversal of 39399871 is 17899393.

It is not a de Polignac number, because 39399871 - 2⁷ = 39399743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

Its product of digits (367416) is a multiple of the sum of its prime divisors (5103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39399821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5521 + ... + 10453.

It is an arithmetic number, because the mean of its divisors is an integer number (3843586).

Almost surely, 2^39399871 is an apocalyptic number.

39399871 is a deficient number, since it is larger than the sum of its proper divisors (6723161).

39399871 is a wasteful number, since it uses less digits than its factorization.

39399871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110 (or 5103 counting only the distinct ones).

The product of its digits is 367416, while the sum is 49.

The square root of 39399871 is about 6276.9316548772. The cubic root of 39399871 is about 340.2762201713.

The spelling of 39399871 in words is "thirty-nine million, three hundred ninety-nine thousand, eight hundred seventy-one".