83870040 has 64 divisors (see below), whose sum is σ = 254469600. Its totient is φ = 22111232.

The previous prime is 83870021. The next prime is 83870041. The reversal of 83870040 is 4007838.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83870041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6754 + ... + 14606.

Almost surely, 2^83870040 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 83870040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127234800).

83870040 is an abundant number, since it is smaller than the sum of its proper divisors (170599560).

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

83870040 is a wasteful number, since it uses less digits than its factorization.

83870040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956 (or 7952 counting only the distinct ones).

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

The square root of 83870040 is about 9158.0587462628. The cubic root of 83870040 is about 437.7259393518.

Adding to 83870040 its reverse (4007838), we get a palindrome (87877878).

The spelling of 83870040 in words is "eighty-three million, eight hundred seventy thousand, forty".