28390926 has 8 divisors (see below), whose sum is σ = 56781864. Its totient is φ = 9463640.

The previous prime is 28390919. The next prime is 28390927. The reversal of 28390926 is 62909382.

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

28390926 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390927) 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, 2365905 + ... + 2365916.

It is an arithmetic number, because the mean of its divisors is an integer number (7097733).

Almost surely, 2^28390926 is an apocalyptic number.

28390926 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.

28390926 is a wasteful number, since it uses less digits than its factorization.

28390926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731826.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 28390926 is about 5328.3136168961. The cubic root of 28390926 is about 305.0655632592.

The spelling of 28390926 in words is "twenty-eight million, three hundred ninety thousand, nine hundred twenty-six".