28030870 has 16 divisors (see below), whose sum is σ = 57663648. Its totient is φ = 9610560.

The previous prime is 28030861. The next prime is 28030889. The reversal of 28030870 is 7803082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200151 + ... + 200290.

It is an arithmetic number, because the mean of its divisors is an integer number (3603978).

Almost surely, 2^28030870 is an apocalyptic number.

28030870 is an abundant number, since it is smaller than the sum of its proper divisors (29632778).

28030870 is a wasteful number, since it uses less digits than its factorization.

28030870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400455.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28030870 is about 5294.4187594107. The cubic root of 28030870 is about 303.7704508464.

It can be divided in two parts, 28030 and 870, that added together give a square (28900 = 170²).

The spelling of 28030870 in words is "twenty-eight million, thirty thousand, eight hundred seventy".