28891074 has 8 divisors (see below), whose sum is σ = 57782160. Its totient is φ = 9630356.

The previous prime is 28891073. The next prime is 28891081. The reversal of 28891074 is 47019882.

It is a sphenic number, since it is the product of 3 distinct primes.

28891074 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28891073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2407584 + ... + 2407595.

It is an arithmetic number, because the mean of its divisors is an integer number (7222770).

Almost surely, 2^28891074 is an apocalyptic number.

28891074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28891074 is a wasteful number, since it uses less digits than its factorization.

28891074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815184.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 28891074 is about 5375.0417672796. The cubic root of 28891074 is about 306.8465388271.

The spelling of 28891074 in words is "twenty-eight million, eight hundred ninety-one thousand, seventy-four".