84973640 has 32 divisors (see below), whose sum is σ = 193347000. Its totient is φ = 33606144.

The previous prime is 84973639. The next prime is 84973673. The reversal of 84973640 is 4637948.

It can be written as a sum of positive squares in 4 ways, for example, as 66945124 + 18028516 = 8182^2 + 4246^2 .

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, 8375 + ... + 15494.

Almost surely, 2^84973640 is an apocalyptic number.

It is an amenable number.

84973640 is an abundant number, since it is smaller than the sum of its proper divisors (108373360).

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

84973640 is a wasteful number, since it uses less digits than its factorization.

84973640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23969 (or 23965 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 84973640 is about 9218.1147747248. The cubic root of 84973640 is about 439.6375113675.

The spelling of 84973640 in words is "eighty-four million, nine hundred seventy-three thousand, six hundred forty".