84439994 has 8 divisors (see below), whose sum is σ = 130083348. Its totient is φ = 41078880.

The previous prime is 84439991. The next prime is 84439997. The reversal of 84439994 is 49993448.

It is an interprime number because it is at equal distance from previous prime (84439991) and next prime (84439997).

It can be written as a sum of positive squares in 2 ways, for example, as 65820769 + 18619225 = 8113^2 + 4315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×84439994² = 14260225173440072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84439991) 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 3 ways as a sum of consecutive naturals, for example, 570467 + ... + 570614.

Almost surely, 2^84439994 is an apocalyptic number.

84439994 is a deficient number, since it is larger than the sum of its proper divisors (45643354).

84439994 is a wasteful number, since it uses less digits than its factorization.

84439994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141120.

The product of its digits is 1119744, while the sum is 50.

The square root of 84439994 is about 9189.1236796552. The cubic root of 84439994 is about 438.7152502626.

The spelling of 84439994 in words is "eighty-four million, four hundred thirty-nine thousand, nine hundred ninety-four".