84339990 has 48 divisors (see below), whose sum is σ = 250612128. Its totient is φ = 19277568.

The previous prime is 84339989. The next prime is 84339991. The reversal of 84339990 is 9993348.

It is an interprime number because it is at equal distance from previous prime (84339989) and next prime (84339991).

It is a super-2 number, since 2×84339990² = 14226467826400200, 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 a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84339991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66307 + ... + 67566.

It is an arithmetic number, because the mean of its divisors is an integer number (5221086).

Almost surely, 2^84339990 is an apocalyptic number.

84339990 is an abundant number, since it is smaller than the sum of its proper divisors (166272138).

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

84339990 is a wasteful number, since it uses less digits than its factorization.

84339990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133893 (or 133890 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 84339990 is about 9183.6806346911. The cubic root of 84339990 is about 438.5419887182.

The spelling of 84339990 in words is "eighty-four million, three hundred thirty-nine thousand, nine hundred ninety".