31140430 has 64 divisors (see below), whose sum is σ = 64696320. Its totient is φ = 10713600.

The previous prime is 31140419. The next prime is 31140467. The reversal of 31140430 is 3404113.

31140430 = T₁₈₀₁ + T₁₈₀₂ + ... + T₁₈₁₉.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99975 + ... + 100285.

It is an arithmetic number, because the mean of its divisors is an integer number (1010880).

Almost surely, 2^31140430 is an apocalyptic number.

31140430 is an abundant number, since it is smaller than the sum of its proper divisors (33555890).

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

31140430 is a wasteful number, since it uses less digits than its factorization.

31140430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31140430 is about 5580.3610994272. The cubic root of 31140430 is about 314.6116992486.

Adding to 31140430 its reverse (3404113), we get a palindrome (34544543).

The spelling of 31140430 in words is "thirty-one million, one hundred forty thousand, four hundred thirty".