31401404 has 24 divisors (see below), whose sum is σ = 55910400. Its totient is φ = 15429744.

The previous prime is 31401401. The next prime is 31401407. The reversal of 31401404 is 40410413.

It is an interprime number because it is at equal distance from previous prime (31401401) and next prime (31401407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401401) 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, 81797 + ... + 82179.

It is an arithmetic number, because the mean of its divisors is an integer number (2329600).

Almost surely, 2^31401404 is an apocalyptic number.

It is an amenable number.

31401404 is a deficient number, since it is larger than the sum of its proper divisors (24508996).

31401404 is a wasteful number, since it uses less digits than its factorization.

31401404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31401404 is about 5603.6955663205. The cubic root of 31401404 is about 315.4881287272.

Adding to 31401404 its reverse (40410413), we get a palindrome (71811817).

Subtracting 31401404 from its reverse (40410413), we obtain a palindrome (9009009).

The spelling of 31401404 in words is "thirty-one million, four hundred one thousand, four hundred four".