28731950 has 24 divisors (see below), whose sum is σ = 57553608. Its totient is φ = 10608480.

The previous prime is 28731949. The next prime is 28731973. The reversal of 28731950 is 5913782.

It is a self number, because there is not a number n which added to its sum of digits gives 28731950.

It is a congruent number.

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, 21452 + ... + 22751.

It is an arithmetic number, because the mean of its divisors is an integer number (2398067).

Almost surely, 2^28731950 is an apocalyptic number.

28731950 is an abundant number, since it is smaller than the sum of its proper divisors (28821658).

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

28731950 is a wasteful number, since it uses less digits than its factorization.

28731950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44228 (or 44223 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 28731950 is about 5360.2192119353. The cubic root of 28731950 is about 306.2821596104.

The spelling of 28731950 in words is "twenty-eight million, seven hundred thirty-one thousand, nine hundred fifty".