31424430 has 32 divisors (see below), whose sum is σ = 75613824. Its totient is φ = 8358176.

The previous prime is 31424401. The next prime is 31424467. The reversal of 31424430 is 3442413.

It is a junction number, because it is equal to n+sod(n) for n = 31424397 and 31424406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12889 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (2362932).

Almost surely, 2^31424430 is an apocalyptic number.

31424430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31424430 is an abundant number, since it is smaller than the sum of its proper divisors (44189394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31424430 is a wasteful number, since it uses less digits than its factorization.

31424430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31424430 is about 5605.7497268430. The cubic root of 31424430 is about 315.5652235259.

Adding to 31424430 its reverse (3442413), we get a palindrome (34866843).

The spelling of 31424430 in words is "thirty-one million, four hundred twenty-four thousand, four hundred thirty".