83478320 has 20 divisors (see below), whose sum is σ = 194087280. Its totient is φ = 33391296.

The previous prime is 83478289. The next prime is 83478323. The reversal of 83478320 is 2387438.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83478323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521660 + ... + 521819.

It is an arithmetic number, because the mean of its divisors is an integer number (9704364).

Almost surely, 2^83478320 is an apocalyptic number.

83478320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83478320 is an abundant number, since it is smaller than the sum of its proper divisors (110608960).

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

83478320 is a wasteful number, since it uses less digits than its factorization.

83478320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043492 (or 1043486 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 83478320 is about 9136.6470874167. The cubic root of 83478320 is about 437.0434006401.

The spelling of 83478320 in words is "eighty-three million, four hundred seventy-eight thousand, three hundred twenty".