83788380 has 144 divisors (see below), whose sum is σ = 278669664. Its totient is φ = 20252160.

The previous prime is 83788373. The next prime is 83788403. The reversal of 83788380 is 8388738.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142447 + ... + 143033.

It is an arithmetic number, because the mean of its divisors is an integer number (1935206).

Almost surely, 2^83788380 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 83788380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139334832).

83788380 is an abundant number, since it is smaller than the sum of its proper divisors (194881284).

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

83788380 is a wasteful number, since it uses less digits than its factorization.

83788380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 83788380 is about 9153.5992920818. The cubic root of 83788380 is about 437.5838293786.

The spelling of 83788380 in words is "eighty-three million, seven hundred eighty-eight thousand, three hundred eighty".