28720050 has 24 divisors (see below), whose sum is σ = 71226096. Its totient is φ = 7658640.

The previous prime is 28720037. The next prime is 28720073. The reversal of 28720050 is 5002782.

It is a self number, because there is not a number n which added to its sum of digits gives 28720050.

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, 95584 + ... + 95883.

It is an arithmetic number, because the mean of its divisors is an integer number (2967754).

Almost surely, 2^28720050 is an apocalyptic number.

28720050 is an abundant number, since it is smaller than the sum of its proper divisors (42506046).

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

28720050 is a wasteful number, since it uses less digits than its factorization.

28720050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191482 (or 191477 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 28720050 is about 5359.1090677462. The cubic root of 28720050 is about 306.2398691637.

The spelling of 28720050 in words is "twenty-eight million, seven hundred twenty thousand, fifty".