30338155 has 16 divisors (see below), whose sum is σ = 39261600. Its totient is φ = 22429440.

The previous prime is 30338153. The next prime is 30338201. The reversal of 30338155 is 55183303.

30338155 is a nontrivial binomial coefficient, being equal to C(7790, 2).

It is not a de Polignac number, because 30338155 - 2¹ = 30338153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30338153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (2453850).

Almost surely, 2^30338155 is an apocalyptic number.

30338155 is the 7789-th triangular number and also the 3895-th hexagonal number.

30338155 is the 2597-th centered nonagonal number.

30338155 is a deficient number, since it is larger than the sum of its proper divisors (8923445).

30338155 is a wasteful number, since it uses less digits than its factorization.

30338155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 30338155 is about 5508.0082607055. The cubic root of 30338155 is about 311.8863649017.

The spelling of 30338155 in words is "thirty million, three hundred thirty-eight thousand, one hundred fifty-five".