84229918 has 4 divisors (see below), whose sum is σ = 126344880. Its totient is φ = 42114958.

The previous prime is 84229903. The next prime is 84229919. The reversal of 84229918 is 81992248.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84229919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21057478 + ... + 21057481.

It is an arithmetic number, because the mean of its divisors is an integer number (31586220).

Almost surely, 2^84229918 is an apocalyptic number.

84229918 is a deficient number, since it is larger than the sum of its proper divisors (42114962).

84229918 is a wasteful number, since it uses less digits than its factorization.

84229918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42114961.

The product of its digits is 82944, while the sum is 43.

The square root of 84229918 is about 9177.6858739009. The cubic root of 84229918 is about 438.3511254888.

Subtracting from 84229918 its reverse (81992248), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 84229918 in words is "eighty-four million, two hundred twenty-nine thousand, nine hundred eighteen".