30225638 has 4 divisors (see below), whose sum is σ = 45338460. Its totient is φ = 15112818.

The previous prime is 30225631. The next prime is 30225649. The reversal of 30225638 is 83652203.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30225638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30225631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7556408 + ... + 7556411.

It is an arithmetic number, because the mean of its divisors is an integer number (11334615).

Almost surely, 2^30225638 is an apocalyptic number.

30225638 is a deficient number, since it is larger than the sum of its proper divisors (15112822).

30225638 is a wasteful number, since it uses less digits than its factorization.

30225638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15112821.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 30225638 is about 5497.7848266370. The cubic root of 30225638 is about 311.5003164752.

The spelling of 30225638 in words is "thirty million, two hundred twenty-five thousand, six hundred thirty-eight".