28119450 has 24 divisors (see below), whose sum is σ = 69736608. Its totient is φ = 7498480.

The previous prime is 28119439. The next prime is 28119517. The reversal of 28119450 is 5491182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93582 + ... + 93881.

It is an arithmetic number, because the mean of its divisors is an integer number (2905692).

Almost surely, 2^28119450 is an apocalyptic number.

28119450 is an abundant number, since it is smaller than the sum of its proper divisors (41617158).

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

28119450 is a wasteful number, since it uses less digits than its factorization.

28119450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187478 (or 187473 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 28119450 is about 5302.7775740644. Note that the first 3 decimals coincide. The cubic root of 28119450 is about 304.0900947762.

The spelling of 28119450 in words is "twenty-eight million, one hundred nineteen thousand, four hundred fifty".