28390850 has 48 divisors (see below), whose sum is σ = 56567808. Its totient is φ = 10563840.

The previous prime is 28390849. The next prime is 28390891. The reversal of 28390850 is 5809382.

It is a self number, because there is not a number n which added to its sum of digits gives 28390850.

It is a congruent number.

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, 107819 + ... + 108081.

It is an arithmetic number, because the mean of its divisors is an integer number (1178496).

Almost surely, 2^28390850 is an apocalyptic number.

28390850 is a deficient number, since it is larger than the sum of its proper divisors (28176958).

28390850 is a wasteful number, since it uses less digits than its factorization.

28390850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28390850 is about 5328.3064851789. The cubic root of 28390850 is about 305.0652910477.

The spelling of 28390850 in words is "twenty-eight million, three hundred ninety thousand, eight hundred fifty".