83905280 has 36 divisors (see below), whose sum is σ = 200982432. Its totient is φ = 33561600.

The previous prime is 83905279. The next prime is 83905303. The reversal of 83905280 is 8250938.

It is a self number, because there is not a number n which added to its sum of digits gives 83905280.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31496 + ... + 34055.

Almost surely, 2^83905280 is an apocalyptic number.

83905280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83905280 is an abundant number, since it is smaller than the sum of its proper divisors (117077152).

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

83905280 is an equidigital number, since it uses as much as digits as its factorization.

83905280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65572 (or 65558 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 83905280 is about 9159.9825327344. The cubic root of 83905280 is about 437.7872377692.

The spelling of 83905280 in words is "eighty-three million, nine hundred five thousand, two hundred eighty".