30757990 has 16 divisors (see below), whose sum is σ = 55534752. Its totient is φ = 12265344.

The previous prime is 30757957. The next prime is 30757997. The reversal of 30757990 is 9975703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30757997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1194 + ... + 7933.

It is an arithmetic number, because the mean of its divisors is an integer number (3470922).

Almost surely, 2^30757990 is an apocalyptic number.

30757990 is a deficient number, since it is larger than the sum of its proper divisors (24776762).

30757990 is a wasteful number, since it uses less digits than its factorization.

30757990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9471.

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 30757990 is about 5545.9886404500. The cubic root of 30757990 is about 313.3184603875.

The spelling of 30757990 in words is "thirty million, seven hundred fifty-seven thousand, nine hundred ninety".