280350728 has 32 divisors (see below), whose sum is σ = 601551360. Its totient is φ = 119990400.

The previous prime is 280350683. The next prime is 280350737. The reversal of 280350728 is 827053082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45428 + ... + 51228.

It is an arithmetic number, because the mean of its divisors is an integer number (18798480).

Almost surely, 2^280350728 is an apocalyptic number.

280350728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

280350728 is an abundant number, since it is smaller than the sum of its proper divisors (321200632).

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

280350728 is a wasteful number, since it uses less digits than its factorization.

280350728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677 (or 6673 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 280350728 is about 16743.6772544146. The cubic root of 280350728 is about 654.4863039094.

It can be divided in two parts, 28035072 and 8, that multiplied together give a square (224280576 = 14976²).

The spelling of 280350728 in words is "two hundred eighty million, three hundred fifty thousand, seven hundred twenty-eight".