30749864 has 8 divisors (see below), whose sum is σ = 57656010. Its totient is φ = 15374928.

The previous prime is 30749837. The next prime is 30749867. The reversal of 30749864 is 46894703.

It can be written as a sum of positive squares in only one way, i.e., 30713764 + 36100 = 5542^2 + 190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (30749867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1921859 + ... + 1921874.

Almost surely, 2^30749864 is an apocalyptic number.

It is an amenable number.

30749864 is a deficient number, since it is larger than the sum of its proper divisors (26906146).

30749864 is a wasteful number, since it uses less digits than its factorization.

30749864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843739 (or 3843735 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 30749864 is about 5545.2559904841. The cubic root of 30749864 is about 313.2908659310.

It can be divided in two parts, 30749 and 864, that added together give a palindrome (31613).

The spelling of 30749864 in words is "thirty million, seven hundred forty-nine thousand, eight hundred sixty-four".