28120030 has 32 divisors (see below), whose sum is σ = 53374464. Its totient is φ = 10645536.

The previous prime is 28120021. The next prime is 28120033. The reversal of 28120030 is 3002182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28119986 and 28120013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28120033) 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, 23097 + ... + 24283.

It is an arithmetic number, because the mean of its divisors is an integer number (1667952).

Almost surely, 2^28120030 is an apocalyptic number.

28120030 is a deficient number, since it is larger than the sum of its proper divisors (25254434).

28120030 is a wasteful number, since it uses less digits than its factorization.

28120030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28120030 is about 5302.8322621030. The cubic root of 28120030 is about 304.0921855122.

The spelling of 28120030 in words is "twenty-eight million, one hundred twenty thousand, thirty".