83947380 has 144 divisors (see below), whose sum is σ = 267412992. Its totient is φ = 19641600.

The previous prime is 83947379. The next prime is 83947387. The reversal of 83947380 is 8374938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83947387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224874 + ... + 225246.

Almost surely, 2^83947380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83947380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133706496).

83947380 is an abundant number, since it is smaller than the sum of its proper divisors (183465612).

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

83947380 is a wasteful number, since it uses less digits than its factorization.

83947380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 83947380 is about 9162.2802838595. The cubic root of 83947380 is about 437.8604463562.

The spelling of 83947380 in words is "eighty-three million, nine hundred forty-seven thousand, three hundred eighty".