30638734 has 8 divisors (see below), whose sum is σ = 52523568. Its totient is φ = 13130880.

The previous prime is 30638731. The next prime is 30638749. The reversal of 30638734 is 43783603.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×30638734² = 1877464042245512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30638734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30638731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094227 + ... + 1094254.

It is an arithmetic number, because the mean of its divisors is an integer number (6565446).

Almost surely, 2^30638734 is an apocalyptic number.

30638734 is a deficient number, since it is larger than the sum of its proper divisors (21884834).

30638734 is a wasteful number, since it uses less digits than its factorization.

30638734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188490.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 30638734 is about 5535.2266439596. The cubic root of 30638734 is about 312.9129993272.

The spelling of 30638734 in words is "thirty million, six hundred thirty-eight thousand, seven hundred thirty-four".