30890281238 has 16 divisors (see below), whose sum is σ = 48354071040. Its totient is φ = 14772370536.

The previous prime is 30890281237. The next prime is 30890281259. The reversal of 30890281238 is 83218209803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30890281231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763523 + ... + 802961.

It is an arithmetic number, because the mean of its divisors is an integer number (3022129440).

Almost surely, 2^30890281238 is an apocalyptic number.

30890281238 is a deficient number, since it is larger than the sum of its proper divisors (17463789802).

30890281238 is a wasteful number, since it uses less digits than its factorization.

30890281238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56491.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 30890281238 in words is "thirty billion, eight hundred ninety million, two hundred eighty-one thousand, two hundred thirty-eight".