30749039 has 4 divisors (see below), whose sum is σ = 32557824. Its totient is φ = 28940256.

The previous prime is 30749027. The next prime is 30749053. The reversal of 30749039 is 93094703.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-30749039 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 904367 + ... + 904400.

It is an arithmetic number, because the mean of its divisors is an integer number (8139456).

Almost surely, 2^30749039 is an apocalyptic number.

30749039 is a deficient number, since it is larger than the sum of its proper divisors (1808785).

30749039 is a wasteful number, since it uses less digits than its factorization.

30749039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808784.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30749039 is about 5545.1816020758. The cubic root of 30749039 is about 313.2880641053.

The spelling of 30749039 in words is "thirty million, seven hundred forty-nine thousand, thirty-nine".