84449520 has 80 divisors (see below), whose sum is σ = 290889120. Its totient is φ = 22519296.

The previous prime is 84449513. The next prime is 84449567. The reversal of 84449520 is 2594448.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 17389 + ... + 21708.

It is an arithmetic number, because the mean of its divisors is an integer number (3636114).

Almost surely, 2^84449520 is an apocalyptic number.

84449520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84449520 is an abundant number, since it is smaller than the sum of its proper divisors (206439600).

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

84449520 is a wasteful number, since it uses less digits than its factorization.

84449520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39119 (or 39107 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 84449520 is about 9189.6419952031. The cubic root of 84449520 is about 438.7317473596.

The spelling of 84449520 in words is "eighty-four million, four hundred forty-nine thousand, five hundred twenty".