82670140 has 48 divisors (see below), whose sum is σ = 208857600. Its totient is φ = 26851392.

The previous prime is 82670059. The next prime is 82670143. The reversal of 82670140 is 4107628.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 82670099 and 82670108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82670143) 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, 12880 + ... + 18199.

It is an arithmetic number, because the mean of its divisors is an integer number (4351200).

Almost surely, 2^82670140 is an apocalyptic number.

It is an amenable number.

82670140 is an abundant number, since it is smaller than the sum of its proper divisors (126187460).

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

82670140 is a wasteful number, since it uses less digits than its factorization.

82670140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31114 (or 31112 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 82670140 is about 9092.3121371849. The cubic root of 82670140 is about 435.6284394419.

Adding to 82670140 its reverse (4107628), we get a palindrome (86777768).

The spelling of 82670140 in words is "eighty-two million, six hundred seventy thousand, one hundred forty".