84007640 has 16 divisors (see below), whose sum is σ = 189017280. Its totient is φ = 33603040.

The previous prime is 84007639. The next prime is 84007643. The reversal of 84007640 is 4670048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84007643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050056 + ... + 1050135.

It is an arithmetic number, because the mean of its divisors is an integer number (11813580).

Almost surely, 2^84007640 is an apocalyptic number.

It is an amenable number.

84007640 is an abundant number, since it is smaller than the sum of its proper divisors (105009640).

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

84007640 is a wasteful number, since it uses less digits than its factorization.

84007640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100202 (or 2100198 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 84007640 is about 9165.5681766053. The cubic root of 84007640 is about 437.9651911760.

Adding to 84007640 its reverse (4670048), we get a palindrome (88677688).

The spelling of 84007640 in words is "eighty-four million, seven thousand, six hundred forty".