83070840 has 128 divisors (see below), whose sum is σ = 270293760. Its totient is φ = 20342784.

The previous prime is 83070833. The next prime is 83070851. The reversal of 83070840 is 4807038.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 83070798 and 83070807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87247 + ... + 88193.

It is an arithmetic number, because the mean of its divisors is an integer number (2111670).

Almost surely, 2^83070840 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 83070840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135146880).

83070840 is an abundant number, since it is smaller than the sum of its proper divisors (187222920).

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

83070840 is a wasteful number, since it uses less digits than its factorization.

83070840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 83070840 is about 9114.3206000228. The cubic root of 83070840 is about 436.3311318907.

Adding to 83070840 its reverse (4807038), we get a palindrome (87877878).

The spelling of 83070840 in words is "eighty-three million, seventy thousand, eight hundred forty".