30513838 has 4 divisors (see below), whose sum is σ = 45770760. Its totient is φ = 15256918.

The previous prime is 30513823. The next prime is 30513839. The reversal of 30513838 is 83831503.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30513839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7628458 + ... + 7628461.

It is an arithmetic number, because the mean of its divisors is an integer number (11442690).

Almost surely, 2^30513838 is an apocalyptic number.

30513838 is a deficient number, since it is larger than the sum of its proper divisors (15256922).

30513838 is a wasteful number, since it uses less digits than its factorization.

30513838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15256921.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 30513838 is about 5523.9332001754. The cubic root of 30513838 is about 312.4872331851.

It can be divided in two parts, 3051 and 3838, that added together give a square (6889 = 83²).

The spelling of 30513838 in words is "thirty million, five hundred thirteen thousand, eight hundred thirty-eight".