31443404 has 24 divisors (see below), whose sum is σ = 61331760. Its totient is φ = 14017536.

The previous prime is 31443397. The next prime is 31443407. The reversal of 31443404 is 40434413.

It is a self number, because there is not a number n which added to its sum of digits gives 31443404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10877 + ... + 13460.

It is an arithmetic number, because the mean of its divisors is an integer number (2555490).

Almost surely, 2^31443404 is an apocalyptic number.

31443404 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31443404 is a deficient number, since it is larger than the sum of its proper divisors (29888356).

31443404 is a wasteful number, since it uses less digits than its factorization.

31443404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24377 (or 24375 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 31443404 is about 5607.4418409824. The cubic root of 31443404 is about 315.6287232708.

Adding to 31443404 its reverse (40434413), we get a palindrome (71877817).

The spelling of 31443404 in words is "thirty-one million, four hundred forty-three thousand, four hundred four".