39493845 has 32 divisors (see below), whose sum is σ = 72483840. Its totient is φ = 20381760.

The previous prime is 39493843. The next prime is 39493847. The reversal of 39493845 is 54839493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39493843) and next prime (39493847).

It is not a de Polignac number, because 39493845 - 2¹ = 39493843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39493845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39493843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (2265120).

Almost surely, 2^39493845 is an apocalyptic number.

It is an amenable number.

39493845 is a deficient number, since it is larger than the sum of its proper divisors (32989995).

39493845 is a wasteful number, since it uses less digits than its factorization.

39493845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9482 (or 9476 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 39493845 is about 6284.4128604031. The cubic root of 39493845 is about 340.5465402433.

The spelling of 39493845 in words is "thirty-nine million, four hundred ninety-three thousand, eight hundred forty-five".