84487636 has 6 divisors (see below), whose sum is σ = 147853370. Its totient is φ = 42243816.

The previous prime is 84487633. The next prime is 84487651. The reversal of 84487636 is 63678448.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 28686736 = 7470^2 + 5356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84487633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560951 + ... + 10560958.

Almost surely, 2^84487636 is an apocalyptic number.

It is an amenable number.

84487636 is a deficient number, since it is larger than the sum of its proper divisors (63365734).

84487636 is a wasteful number, since it uses less digits than its factorization.

84487636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121913 (or 21121911 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 84487636 is about 9191.7156178811. The cubic root of 84487636 is about 438.7977441192.

The spelling of 84487636 in words is "eighty-four million, four hundred eighty-seven thousand, six hundred thirty-six".