30638792 has 36 divisors (see below), whose sum is σ = 61224795. Its totient is φ = 14372208.

The previous prime is 30638791. The next prime is 30638813. The reversal of 30638792 is 29783603.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 15319396 = 3914^2 + 3914^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3914.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30638791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 297413 + ... + 297515.

Almost surely, 2^30638792 is an apocalyptic number.

It is an amenable number.

30638792 is a deficient number, since it is larger than the sum of its proper divisors (30586003).

30638792 is a wasteful number, since it uses less digits than its factorization.

30638792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 30638792 is about 5535.2318831283. The cubic root of 30638792 is about 312.9131967782.

The spelling of 30638792 in words is "thirty million, six hundred thirty-eight thousand, seven hundred ninety-two".