30640292 has 12 divisors (see below), whose sum is σ = 55069980. Its totient is φ = 14906016.

The previous prime is 30640279. The next prime is 30640319. The reversal of 30640292 is 29204603.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 872356 = 5456^2 + 934^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103367 + ... + 103662.

It is an arithmetic number, because the mean of its divisors is an integer number (4589165).

Almost surely, 2^30640292 is an apocalyptic number.

It is an amenable number.

30640292 is a deficient number, since it is larger than the sum of its proper divisors (24429688).

30640292 is a wasteful number, since it uses less digits than its factorization.

30640292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207070 (or 207068 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 30640292 is about 5535.3673771485. The cubic root of 30640292 is about 312.9183031820.

Adding to 30640292 its reverse (29204603), we get a palindrome (59844895).

The spelling of 30640292 in words is "thirty million, six hundred forty thousand, two hundred ninety-two".