84139470 has 24 divisors (see below), whose sum is σ = 218762856. Its totient is φ = 22437168.

The previous prime is 84139441. The next prime is 84139481. The reversal of 84139470 is 7493148.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467352 + ... + 467531.

It is an arithmetic number, because the mean of its divisors is an integer number (9115119).

Almost surely, 2^84139470 is an apocalyptic number.

84139470 is an abundant number, since it is smaller than the sum of its proper divisors (134623386).

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

84139470 is a wasteful number, since it uses less digits than its factorization.

84139470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934896 (or 934893 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 84139470 is about 9172.7569465238. The cubic root of 84139470 is about 438.1941654931.

The spelling of 84139470 in words is "eighty-four million, one hundred thirty-nine thousand, four hundred seventy".