83631140 has 12 divisors (see below), whose sum is σ = 175625436. Its totient is φ = 33452448.

The previous prime is 83631083. The next prime is 83631161. The reversal of 83631140 is 4113638.

It can be written as a sum of positive squares in 2 ways, for example, as 62599744 + 21031396 = 7912^2 + 4586^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090759 + ... + 2090798.

It is an arithmetic number, because the mean of its divisors is an integer number (14635453).

Almost surely, 2^83631140 is an apocalyptic number.

It is an amenable number.

83631140 is an abundant number, since it is smaller than the sum of its proper divisors (91994296).

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

83631140 is a wasteful number, since it uses less digits than its factorization.

83631140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181566 (or 4181564 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 83631140 is about 9145.0062875867. The cubic root of 83631140 is about 437.3099299538.

Adding to 83631140 its reverse (4113638), we get a palindrome (87744778).

The spelling of 83631140 in words is "eighty-three million, six hundred thirty-one thousand, one hundred forty".