39928897 has 16 divisors (see below), whose sum is σ = 43591680. Its totient is φ = 36468432.

The previous prime is 39928879. The next prime is 39928901. The reversal of 39928897 is 79882993.

It is not a de Polignac number, because 39928897 - 2¹⁹ = 39404609 is a prime.

Its product of digits (1959552) is a multiple of the sum of its prime divisors (972).

It is not an unprimeable number, because it can be changed into a prime (39928807) 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, 46054 + ... + 46912.

It is an arithmetic number, because the mean of its divisors is an integer number (2724480).

Almost surely, 2^39928897 is an apocalyptic number.

It is an amenable number.

39928897 is a deficient number, since it is larger than the sum of its proper divisors (3662783).

39928897 is a wasteful number, since it uses less digits than its factorization.

39928897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 1959552, while the sum is 55.

The square root of 39928897 is about 6318.9316343825. The cubic root of 39928897 is about 341.7924284474.

It can be divided in two parts, 39928 and 897, that multiplied together give a triangular number (35815416 = T₈₄₆₃).

The spelling of 39928897 in words is "thirty-nine million, nine hundred twenty-eight thousand, eight hundred ninety-seven".