83399280 has 80 divisors (see below), whose sum is σ = 273759264. Its totient is φ = 20930560.

The previous prime is 83399257. The next prime is 83399293. The reversal of 83399280 is 8299338.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6141 + ... + 14300.

Almost surely, 2^83399280 is an apocalyptic number.

83399280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83399280 is an abundant number, since it is smaller than the sum of its proper divisors (190359984).

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

83399280 is a wasteful number, since it uses less digits than its factorization.

83399280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474 (or 20468 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 83399280 is about 9132.3206251204. The cubic root of 83399280 is about 436.9054214276.

The spelling of 83399280 in words is "eighty-three million, three hundred ninety-nine thousand, two hundred eighty".