31420424 has 16 divisors (see below), whose sum is σ = 67329600. Its totient is φ = 13465872.

The previous prime is 31420409. The next prime is 31420447. The reversal of 31420424 is 42402413.

It is a junction number, because it is equal to n+sod(n) for n = 31420396 and 31420405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280484 + ... + 280595.

It is an arithmetic number, because the mean of its divisors is an integer number (4208100).

Almost surely, 2^31420424 is an apocalyptic number.

It is an amenable number.

31420424 is an abundant number, since it is smaller than the sum of its proper divisors (35909176).

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

31420424 is a wasteful number, since it uses less digits than its factorization.

31420424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561092 (or 561088 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31420424 is about 5605.3924037484. The cubic root of 31420424 is about 315.5518134920.

Adding to 31420424 its reverse (42402413), we get a palindrome (73822837).

The spelling of 31420424 in words is "thirty-one million, four hundred twenty thousand, four hundred twenty-four".