28790700 has 72 divisors (see below), whose sum is σ = 87702720. Its totient is φ = 7272000.

The previous prime is 28790659. The next prime is 28790731. The reversal of 28790700 is 709782.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3175 + ... + 8225.

Almost surely, 2^28790700 is an apocalyptic number.

28790700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28790700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43851360).

28790700 is an abundant number, since it is smaller than the sum of its proper divisors (58912020).

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

28790700 is a wasteful number, since it uses less digits than its factorization.

28790700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5087 (or 5080 counting only the distinct ones).

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

The square root of 28790700 is about 5365.6965996970. The cubic root of 28790700 is about 306.4907755270.

The spelling of 28790700 in words is "twenty-eight million, seven hundred ninety thousand, seven hundred".