83370780 has 144 divisors (see below), whose sum is σ = 266133504. Its totient is φ = 21098880.

The previous prime is 83370779. The next prime is 83370797. The reversal of 83370780 is 8707338.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 373749 + ... + 373971.

Almost surely, 2^83370780 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 83370780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133066752).

83370780 is an abundant number, since it is smaller than the sum of its proper divisors (182762724).

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

83370780 is a wasteful number, since it uses less digits than its factorization.

83370780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 83370780 is about 9130.7600997945. The cubic root of 83370780 is about 436.8556479237.

The spelling of 83370780 in words is "eighty-three million, three hundred seventy thousand, seven hundred eighty".