31402746 has 12 divisors (see below), whose sum is σ = 68039322. Its totient is φ = 10467576.

The previous prime is 31402717. The next prime is 31402747. The reversal of 31402746 is 64720413.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 5239521 = 5115^2 + 2289^2 .

It is a super-2 number, since 2×31402746² = 1972264912681032, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31402747) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 872281 + ... + 872316.

Almost surely, 2^31402746 is an apocalyptic number.

31402746 is an abundant number, since it is smaller than the sum of its proper divisors (36636576).

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

31402746 is a wasteful number, since it uses less digits than its factorization.

31402746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744605 (or 1744602 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 31402746 is about 5603.8153074490. The cubic root of 31402746 is about 315.4926229959.

It can be divided in two parts, 3140 and 2746, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 31402746 in words is "thirty-one million, four hundred two thousand, seven hundred forty-six".