31024420 has 24 divisors (see below), whose sum is σ = 74458944. Its totient is φ = 10636896.

The previous prime is 31024393. The next prime is 31024423. The reversal of 31024420 is 2442013.

It is a junction number, because it is equal to n+sod(n) for n = 31024394 and 31024403.

It is not an unprimeable number, because it can be changed into a prime (31024423) 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, 110662 + ... + 110941.

It is an arithmetic number, because the mean of its divisors is an integer number (3102456).

Almost surely, 2^31024420 is an apocalyptic number.

It is an amenable number.

31024420 is an abundant number, since it is smaller than the sum of its proper divisors (43434524).

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

31024420 is a wasteful number, since it uses less digits than its factorization.

31024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221619 (or 221617 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 31024420 is about 5569.9569118621. The cubic root of 31024420 is about 314.2205301651.

Adding to 31024420 its reverse (2442013), we get a palindrome (33466433).

The spelling of 31024420 in words is "thirty-one million, twenty-four thousand, four hundred twenty".