28070880 has 48 divisors (see below), whose sum is σ = 88424784. Its totient is φ = 7485440.

The previous prime is 28070851. The next prime is 28070881. The reversal of 28070880 is 8807082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070881) 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, 28761 + ... + 29720.

It is an arithmetic number, because the mean of its divisors is an integer number (1842183).

Almost surely, 2^28070880 is an apocalyptic number.

28070880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28070880 is an abundant number, since it is smaller than the sum of its proper divisors (60353904).

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

28070880 is a wasteful number, since it uses less digits than its factorization.

28070880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58499 (or 58491 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 28070880 is about 5298.1959193673. The cubic root of 28070880 is about 303.9149115510.

The spelling of 28070880 in words is "twenty-eight million, seventy thousand, eight hundred eighty".