84864540 has 24 divisors (see below), whose sum is σ = 237620880. Its totient is φ = 22630528.

The previous prime is 84864539. The next prime is 84864581. The reversal of 84864540 is 4546848.

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, 707145 + ... + 707264.

It is an arithmetic number, because the mean of its divisors is an integer number (9900870).

Almost surely, 2^84864540 is an apocalyptic number.

It is an amenable number.

84864540 is an abundant number, since it is smaller than the sum of its proper divisors (152756340).

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

84864540 is a wasteful number, since it uses less digits than its factorization.

84864540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414421 (or 1414419 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 84864540 is about 9212.1951781321. The cubic root of 84864540 is about 439.4492765425.

The spelling of 84864540 in words is "eighty-four million, eight hundred sixty-four thousand, five hundred forty".