39923481 has 32 divisors (see below), whose sum is σ = 59839360. Its totient is φ = 23514624.

The previous prime is 39923473. The next prime is 39923483. The reversal of 39923481 is 18432993.

It is not a de Polignac number, because 39923481 - 2³ = 39923473 is a prime.

It is a super-2 number, since 2×39923481² = 3187768670314722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (39923483) 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, 105150 + ... + 105528.

It is an arithmetic number, because the mean of its divisors is an integer number (1869980).

Almost surely, 2^39923481 is an apocalyptic number.

It is an amenable number.

39923481 is a deficient number, since it is larger than the sum of its proper divisors (19915879).

39923481 is a wasteful number, since it uses less digits than its factorization.

39923481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 46656, while the sum is 39.

The square root of 39923481 is about 6318.5030663916. The cubic root of 39923481 is about 341.7769740469.

It can be divided in two parts, 39923 and 481, that added together give a palindrome (40404).

The spelling of 39923481 in words is "thirty-nine million, nine hundred twenty-three thousand, four hundred eighty-one".