84440405 has 16 divisors (see below), whose sum is σ = 116163840. Its totient is φ = 57722112.

The previous prime is 84440359. The next prime is 84440413. The reversal of 84440405 is 50404448.

It is not a de Polignac number, because 84440405 - 2¹⁶ = 84374869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8216 + ... + 15374.

It is an arithmetic number, because the mean of its divisors is an integer number (7260240).

Almost surely, 2^84440405 is an apocalyptic number.

It is an amenable number.

84440405 is a deficient number, since it is larger than the sum of its proper divisors (31723435).

84440405 is a wasteful number, since it uses less digits than its factorization.

84440405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 84440405 is about 9189.1460430227. The cubic root of 84440405 is about 438.7159620567.

The spelling of 84440405 in words is "eighty-four million, four hundred forty thousand, four hundred five".