30749894 has 16 divisors (see below), whose sum is σ = 52793856. Its totient is φ = 13158600.

The previous prime is 30749879. The next prime is 30749897. The reversal of 30749894 is 49894703.

It is a super-2 number, since 2×30749894² = 1891111962022472, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30749897) 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, 11549 + ... + 13959.

It is an arithmetic number, because the mean of its divisors is an integer number (3299616).

Almost surely, 2^30749894 is an apocalyptic number.

30749894 is a deficient number, since it is larger than the sum of its proper divisors (22043962).

30749894 is a wasteful number, since it uses less digits than its factorization.

30749894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 30749894 is about 5545.2586954983. The cubic root of 30749894 is about 313.2909678146.

The spelling of 30749894 in words is "thirty million, seven hundred forty-nine thousand, eight hundred ninety-four".