84457040 has 20 divisors (see below), whose sum is σ = 196362804. Its totient is φ = 33782784.

The previous prime is 84457039. The next prime is 84457067. The reversal of 84457040 is 4075448.

It can be written as a sum of positive squares in 2 ways, for example, as 34951744 + 49505296 = 5912^2 + 7036^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 84456988 and 84457006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527777 + ... + 527936.

Almost surely, 2^84457040 is an apocalyptic number.

84457040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84457040 is an abundant number, since it is smaller than the sum of its proper divisors (111905764).

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

84457040 is a wasteful number, since it uses less digits than its factorization.

84457040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055726 (or 1055720 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 84457040 is about 9190.0511424039. The cubic root of 84457040 is about 438.7447695959.

The spelling of 84457040 in words is "eighty-four million, four hundred fifty-seven thousand, forty".