30499972 has 24 divisors (see below), whose sum is σ = 56734776. Its totient is φ = 14297088.

The previous prime is 30499969. The next prime is 30499993. The reversal of 30499972 is 27999403.

It can be written as a sum of positive squares in 4 ways, for example, as 3936256 + 26563716 = 1984^2 + 5154^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20568 + ... + 22000.

It is an arithmetic number, because the mean of its divisors is an integer number (2363949).

Almost surely, 2^30499972 is an apocalyptic number.

It is an amenable number.

30499972 is a deficient number, since it is larger than the sum of its proper divisors (26234804).

30499972 is a wasteful number, since it uses less digits than its factorization.

30499972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 30499972 is about 5522.6779735922. The cubic root of 30499972 is about 312.4398928662.

The spelling of 30499972 in words is "thirty million, four hundred ninety-nine thousand, nine hundred seventy-two".