28561790 has 16 divisors (see below), whose sum is σ = 51922080. Its totient is φ = 11311200.

The previous prime is 28561787. The next prime is 28561823. The reversal of 28561790 is 9716582.

It is a Curzon 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, 13130 + ... + 15149.

It is an arithmetic number, because the mean of its divisors is an integer number (3245130).

Almost surely, 2^28561790 is an apocalyptic number.

28561790 is a deficient number, since it is larger than the sum of its proper divisors (23360290).

28561790 is a wasteful number, since it uses less digits than its factorization.

28561790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28387.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28561790 is about 5344.3231563969. The cubic root of 28561790 is about 305.6763276972.

The spelling of 28561790 in words is "twenty-eight million, five hundred sixty-one thousand, seven hundred ninety".