31430124 has 72 divisors (see below), whose sum is σ = 87447360. Its totient is φ = 9439200.

The previous prime is 31430117. The next prime is 31430143. The reversal of 31430124 is 42103413.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31430097 and 31430106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54759 + ... + 55329.

Almost surely, 2^31430124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31430124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43723680).

31430124 is an abundant number, since it is smaller than the sum of its proper divisors (56017236).

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

31430124 is a wasteful number, since it uses less digits than its factorization.

31430124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31430124 is about 5606.2575752457. The cubic root of 31430124 is about 315.5842821571.

Adding to 31430124 its reverse (42103413), we get a palindrome (73533537).

Subtracting 31430124 from its reverse (42103413), we obtain a square (10673289 = 3267²).

The spelling of 31430124 in words is "thirty-one million, four hundred thirty thousand, one hundred twenty-four".