39801399 has 16 divisors (see below), whose sum is σ = 58316160. Its totient is φ = 23945760.

The previous prime is 39801389. The next prime is 39801439. The reversal of 39801399 is 99310893.

It is a happy number.

It is not a de Polignac number, because 39801399 - 2⁵ = 39801367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39801399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39801319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249 + ... + 8925.

It is an arithmetic number, because the mean of its divisors is an integer number (3644760).

Almost surely, 2^39801399 is an apocalyptic number.

39801399 is a deficient number, since it is larger than the sum of its proper divisors (18514761).

39801399 is a wasteful number, since it uses less digits than its factorization.

39801399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 39801399 is about 6308.8349954647. The cubic root of 39801399 is about 341.4282451118.

The spelling of 39801399 in words is "thirty-nine million, eight hundred one thousand, three hundred ninety-nine".