28000070 has 24 divisors (see below), whose sum is σ = 58629744. Its totient is φ = 9599856.

The previous prime is 28000069. The next prime is 28000073. The reversal of 28000070 is 7000082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28082 + ... + 29061.

It is an arithmetic number, because the mean of its divisors is an integer number (2442906).

Almost surely, 2^28000070 is an apocalyptic number.

28000070 is an abundant number, since it is smaller than the sum of its proper divisors (30629674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28000070 is a wasteful number, since it uses less digits than its factorization.

28000070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57164 (or 57157 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 28000070 is about 5291.5092365033. The cubic root of 28000070 is about 303.6591502364.

The spelling of 28000070 in words is "twenty-eight million, seventy", and thus it is an aban number and an uban number.