28950819 has 4 divisors (see below), whose sum is σ = 38601096. Its totient is φ = 19300544.

The previous prime is 28950743. The next prime is 28950821. The reversal of 28950819 is 91805982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28950819 - 2¹⁵ = 28918051 is a prime.

It is a super-2 number, since 2×28950819² = 1676299841541522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28950829) 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, 4825134 + ... + 4825139.

It is an arithmetic number, because the mean of its divisors is an integer number (9650274).

Almost surely, 2^28950819 is an apocalyptic number.

28950819 is a deficient number, since it is larger than the sum of its proper divisors (9650277).

28950819 is an equidigital number, since it uses as much as digits as its factorization.

28950819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650276.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 28950819 is about 5380.5965282671. The cubic root of 28950819 is about 307.0579065791.

The spelling of 28950819 in words is "twenty-eight million, nine hundred fifty thousand, eight hundred nineteen".