39128799 has 4 divisors (see below), whose sum is σ = 52171736. Its totient is φ = 26085864.

The previous prime is 39128777. The next prime is 39128807. The reversal of 39128799 is 99782193.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 39128799 - 2⁵ = 39128767 is a prime.

It is a super-2 number, since 2×39128799² = 3062125822364802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39128729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6521464 + ... + 6521469.

It is an arithmetic number, because the mean of its divisors is an integer number (13042934).

Almost surely, 2^39128799 is an apocalyptic number.

39128799 is a deficient number, since it is larger than the sum of its proper divisors (13042937).

39128799 is a wasteful number, since it uses less digits than its factorization.

39128799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13042936.

The product of its digits is 244944, while the sum is 48.

The square root of 39128799 is about 6255.3016713824. The cubic root of 39128799 is about 339.4940542931.

The spelling of 39128799 in words is "thirty-nine million, one hundred twenty-eight thousand, seven hundred ninety-nine".