84744387 has 40 divisors (see below), whose sum is σ = 155820896. Its totient is φ = 44696448.

The previous prime is 84744343. The next prime is 84744419. The reversal of 84744387 is 78344748.

It is not a de Polignac number, because 84744387 - 2⁶ = 84744323 is a prime.

It is a super-2 number, since 2×84744387² = 14363222256011538, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84744307) 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 39 ways as a sum of consecutive naturals, for example, 1623 + ... + 13119.

Almost surely, 2^84744387 is an apocalyptic number.

84744387 is a deficient number, since it is larger than the sum of its proper divisors (71076509).

84744387 is a wasteful number, since it uses less digits than its factorization.

84744387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11529 (or 11520 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 84744387 is about 9205.6714584000. The cubic root of 84744387 is about 439.2417847462.

The spelling of 84744387 in words is "eighty-four million, seven hundred forty-four thousand, three hundred eighty-seven".