84109390 has 48 divisors (see below), whose sum is σ = 166896288. Its totient is φ = 30457152.

The previous prime is 84109381. The next prime is 84109393. The reversal of 84109390 is 9390148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84109393) 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 23 ways as a sum of consecutive naturals, for example, 82524 + ... + 83536.

It is an arithmetic number, because the mean of its divisors is an integer number (3477006).

Almost surely, 2^84109390 is an apocalyptic number.

84109390 is a deficient number, since it is larger than the sum of its proper divisors (82786898).

84109390 is a wasteful number, since it uses less digits than its factorization.

84109390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 84109390 is about 9171.1171620474. The cubic root of 84109390 is about 438.1419408889.

The spelling of 84109390 in words is "eighty-four million, one hundred nine thousand, three hundred ninety".