30499668 has 18 divisors (see below), whose sum is σ = 77096474. Its totient is φ = 10166544.

The previous prime is 30499657. The next prime is 30499669. The reversal of 30499668 is 86699403.

It can be written as a sum of positive squares in only one way, i.e., 30338064 + 161604 = 5508^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×30499668² = 1860459496220448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30499669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 423571 + ... + 423642.

Almost surely, 2^30499668 is an apocalyptic number.

It is an amenable number.

30499668 is an abundant number, since it is smaller than the sum of its proper divisors (46596806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30499668 is a wasteful number, since it uses less digits than its factorization.

30499668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847223 (or 847218 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 30499668 is about 5522.6504506441. The cubic root of 30499668 is about 312.4388548102.

The spelling of 30499668 in words is "thirty million, four hundred ninety-nine thousand, six hundred sixty-eight".