39402789 has 12 divisors (see below), whose sum is σ = 55449216. Its totient is φ = 24885288.

The previous prime is 39402757. The next prime is 39402823. The reversal of 39402789 is 98720493.

39402789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39402789 - 2⁵ = 39402757 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39402789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39402739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17109 + ... + 19274.

It is an arithmetic number, because the mean of its divisors is an integer number (4620768).

Almost surely, 2^39402789 is an apocalyptic number.

It is an amenable number.

39402789 is a deficient number, since it is larger than the sum of its proper divisors (16046427).

39402789 is a wasteful number, since it uses less digits than its factorization.

39402789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36424 (or 36405 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 39402789 is about 6277.1640889816. The cubic root of 39402789 is about 340.2846203806.

The spelling of 39402789 in words is "thirty-nine million, four hundred two thousand, seven hundred eighty-nine".