28097070 has 32 divisors (see below), whose sum is σ = 68871168. Its totient is φ = 7332768.

The previous prime is 28097059. The next prime is 28097087. The reversal of 28097070 is 7079082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8554 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (2152224).

Almost surely, 2^28097070 is an apocalyptic number.

28097070 is an abundant number, since it is smaller than the sum of its proper divisors (40774098).

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

28097070 is a wasteful number, since it uses less digits than its factorization.

28097070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19984.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 28097070 is about 5300.6669391691. Note that the first 3 decimals coincide. The cubic root of 28097070 is about 304.0093992362.

The spelling of 28097070 in words is "twenty-eight million, ninety-seven thousand, seventy".