84401918 has 16 divisors (see below), whose sum is σ = 129031920. Its totient is φ = 41395200.

The previous prime is 84401909. The next prime is 84401969. The reversal of 84401918 is 81910448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59198 + ... + 60606.

It is an arithmetic number, because the mean of its divisors is an integer number (8064495).

Almost surely, 2^84401918 is an apocalyptic number.

84401918 is a deficient number, since it is larger than the sum of its proper divisors (44630002).

84401918 is a wasteful number, since it uses less digits than its factorization.

84401918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 84401918 is about 9187.0516489242. The cubic root of 84401918 is about 438.6492979710.

The spelling of 84401918 in words is "eighty-four million, four hundred one thousand, nine hundred eighteen".