30149823 has 32 divisors (see below), whose sum is σ = 46835712. Its totient is φ = 17049600.

The previous prime is 30149807. The next prime is 30149843. The reversal of 30149823 is 32894103.

It is not a de Polignac number, because 30149823 - 2⁴ = 30149807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30149843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124983 + ... + 125223.

It is an arithmetic number, because the mean of its divisors is an integer number (1463616).

Almost surely, 2^30149823 is an apocalyptic number.

30149823 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

30149823 is a deficient number, since it is larger than the sum of its proper divisors (16685889).

30149823 is a wasteful number, since it uses less digits than its factorization.

30149823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 30149823 is about 5490.8854477215. The cubic root of 30149823 is about 311.2396528874.

The spelling of 30149823 in words is "thirty million, one hundred forty-nine thousand, eight hundred twenty-three".