31340430 has 48 divisors (see below), whose sum is σ = 88895664. Its totient is φ = 7597440.

The previous prime is 31340423. The next prime is 31340447. The reversal of 31340430 is 3404313.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14839 + ... + 16818.

It is an arithmetic number, because the mean of its divisors is an integer number (1851993).

Almost surely, 2^31340430 is an apocalyptic number.

31340430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31340430 is an abundant number, since it is smaller than the sum of its proper divisors (57555234).

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

31340430 is a wasteful number, since it uses less digits than its factorization.

31340430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31681 (or 31678 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31340430 is about 5598.2524058853. The cubic root of 31340430 is about 315.2837956391.

Adding to 31340430 its reverse (3404313), we get a palindrome (34744743).

The spelling of 31340430 in words is "thirty-one million, three hundred forty thousand, four hundred thirty".