83634440 has 32 divisors (see below), whose sum is σ = 196361280. Its totient is φ = 31998912.

The previous prime is 83634403. The next prime is 83634443. The reversal of 83634440 is 4443638.

It is a super-2 number, since 2×83634440² = 13989439108227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83634397 and 83634406.

It is not an unprimeable number, because it can be changed into a prime (83634443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44534 + ... + 46373.

It is an arithmetic number, because the mean of its divisors is an integer number (6136290).

Almost surely, 2^83634440 is an apocalyptic number.

It is an amenable number.

83634440 is an abundant number, since it is smaller than the sum of its proper divisors (112726840).

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

83634440 is a wasteful number, since it uses less digits than its factorization.

83634440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90941 (or 90937 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 83634440 is about 9145.1867121454. The cubic root of 83634440 is about 437.3156818137.

The spelling of 83634440 in words is "eighty-three million, six hundred thirty-four thousand, four hundred forty".