39457889 has 4 divisors (see below), whose sum is σ = 41534640. Its totient is φ = 37381140.

The previous prime is 39457879. The next prime is 39457907. The reversal of 39457889 is 98875493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39457889 - 2²⁰ = 38409313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39457889.

It is not an unprimeable number, because it can be changed into a prime (39457829) 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, 1038347 + ... + 1038384.

It is an arithmetic number, because the mean of its divisors is an integer number (10383660).

Almost surely, 2^39457889 is an apocalyptic number.

It is an amenable number.

39457889 is a deficient number, since it is larger than the sum of its proper divisors (2076751).

39457889 is a wasteful number, since it uses less digits than its factorization.

39457889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076750.

The product of its digits is 2177280, while the sum is 53.

The square root of 39457889 is about 6281.5514803271. The cubic root of 39457889 is about 340.4431620315.

It can be divided in two parts, 3945 and 7889, that multiplied together give a triangular number (31122105 = T₇₈₈₉).

The spelling of 39457889 in words is "thirty-nine million, four hundred fifty-seven thousand, eight hundred eighty-nine".