30649972 has 6 divisors (see below), whose sum is σ = 53637458. Its totient is φ = 15324984.

The previous prime is 30649967. The next prime is 30649973. The reversal of 30649972 is 27994603.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 2390116 = 5316^2 + 1546^2 .

It is a super-4 number, since 4×30649972⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30649973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3831243 + ... + 3831250.

Almost surely, 2^30649972 is an apocalyptic number.

It is an amenable number.

30649972 is a deficient number, since it is larger than the sum of its proper divisors (22987486).

30649972 is a wasteful number, since it uses less digits than its factorization.

30649972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662497 (or 7662495 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 30649972 is about 5536.2416854758. The cubic root of 30649972 is about 312.9512525008.

The spelling of 30649972 in words is "thirty million, six hundred forty-nine thousand, nine hundred seventy-two".