28780150 has 72 divisors (see below), whose sum is σ = 66029256. Its totient is φ = 9273600.

The previous prime is 28780139. The next prime is 28780159. The reversal of 28780150 is 5108782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780159) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41305 + ... + 41995.

It is an arithmetic number, because the mean of its divisors is an integer number (917073).

Almost surely, 2^28780150 is an apocalyptic number.

28780150 is an abundant number, since it is smaller than the sum of its proper divisors (37249106).

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

28780150 is a wasteful number, since it uses less digits than its factorization.

28780150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 28780150 is about 5364.7134126624. The cubic root of 28780150 is about 306.4533343543.

The spelling of 28780150 in words is "twenty-eight million, seven hundred eighty thousand, one hundred fifty".