31779146 has 36 divisors (see below), whose sum is σ = 58061682. Its totient is φ = 13006224.

The previous prime is 31779131. The next prime is 31779151. The reversal of 31779146 is 64197713.

It can be written as a sum of positive squares in only one way, i.e., 31753225 + 25921 = 5635^2 + 161^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 51536 + ... + 52148.

Almost surely, 2^31779146 is an apocalyptic number.

31779146 is a deficient number, since it is larger than the sum of its proper divisors (26282536).

31779146 is a wasteful number, since it uses less digits than its factorization.

31779146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 645 counting only the distinct ones).

The product of its digits is 31752, while the sum is 38.

The square root of 31779146 is about 5637.2995308037. The cubic root of 31779146 is about 316.7481405627.

The spelling of 31779146 in words is "thirty-one million, seven hundred seventy-nine thousand, one hundred forty-six".