30892138 has 16 divisors (see below), whose sum is σ = 48918240. Its totient is φ = 14590800.

The previous prime is 30892133. The next prime is 30892153. The reversal of 30892138 is 83129803.

It is a super-2 number, since 2×30892138² = 1908648380422088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30892133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15033 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (3057390).

Almost surely, 2^30892138 is an apocalyptic number.

30892138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

30892138 is a deficient number, since it is larger than the sum of its proper divisors (18026102).

30892138 is a wasteful number, since it uses less digits than its factorization.

30892138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 30892138 is about 5558.0696289269. The cubic root of 30892138 is about 313.7733025025.

The spelling of 30892138 in words is "thirty million, eight hundred ninety-two thousand, one hundred thirty-eight".