84390027890 has 16 divisors (see below), whose sum is σ = 173602343232. Its totient is φ = 28933723824.

The previous prime is 84390027871. The next prime is 84390027893. The reversal of 84390027890 is 9872009348.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84390027893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602785844 + ... + 602785983.

It is an arithmetic number, because the mean of its divisors is an integer number (10850146452).

Almost surely, 2^84390027890 is an apocalyptic number.

84390027890 is an abundant number, since it is smaller than the sum of its proper divisors (89212315342).

84390027890 is a wasteful number, since it uses less digits than its factorization.

84390027890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205571841.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 84390027890 in words is "eighty-four billion, three hundred ninety million, twenty-seven thousand, eight hundred ninety".