30749090 has 32 divisors (see below), whose sum is σ = 58973184. Its totient is φ = 11503360.

The previous prime is 30749083. The next prime is 30749099. The reversal of 30749090 is 9094703.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (30749099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31997 + ... + 32943.

It is an arithmetic number, because the mean of its divisors is an integer number (1842912).

Almost surely, 2^30749090 is an apocalyptic number.

30749090 is a deficient number, since it is larger than the sum of its proper divisors (28224094).

30749090 is a wasteful number, since it uses less digits than its factorization.

30749090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 30749090 is about 5545.1862006609. The cubic root of 30749090 is about 313.2882373105.

The spelling of 30749090 in words is "thirty million, seven hundred forty-nine thousand, ninety".