84181340 has 24 divisors (see below), whose sum is σ = 177714432. Its totient is φ = 33494720.

The previous prime is 84181333. The next prime is 84181367. The reversal of 84181340 is 4318148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7199 + ... + 14838.

It is an arithmetic number, because the mean of its divisors is an integer number (7404768).

Almost surely, 2^84181340 is an apocalyptic number.

It is an amenable number.

84181340 is an abundant number, since it is smaller than the sum of its proper divisors (93533092).

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

84181340 is a wasteful number, since it uses less digits than its factorization.

84181340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22237 (or 22235 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 84181340 is about 9175.0389644949. The cubic root of 84181340 is about 438.2668390639.

Adding to 84181340 its reverse (4318148), we get a palindrome (88499488).

The spelling of 84181340 in words is "eighty-four million, one hundred eighty-one thousand, three hundred forty".