31034340 has 60 divisors (see below), whose sum is σ = 97360956. Its totient is φ = 8275392.

The previous prime is 31034329. The next prime is 31034411. The reversal of 31034340 is 4343013.

It can be written as a sum of positive squares in 2 ways, for example, as 4901796 + 26132544 = 2214^2 + 5112^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7959 + ... + 11198.

Almost surely, 2^31034340 is an apocalyptic number.

31034340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31034340 is an abundant number, since it is smaller than the sum of its proper divisors (66326616).

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

31034340 is a wasteful number, since it uses less digits than its factorization.

31034340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19178 (or 19167 counting only the distinct ones).

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

The square root of 31034340 is about 5570.8473323185. The cubic root of 31034340 is about 314.2540170709.

Adding to 31034340 its reverse (4343013), we get a palindrome (35377353).

The spelling of 31034340 in words is "thirty-one million, thirty-four thousand, three hundred forty".