87684420 has 24 divisors (see below), whose sum is σ = 245516544. Its totient is φ = 23382496.

The previous prime is 87684409. The next prime is 87684427. The reversal of 87684420 is 2448678.

It is not an unprimeable number, because it can be changed into a prime (87684427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730644 + ... + 730763.

It is an arithmetic number, because the mean of its divisors is an integer number (10229856).

Almost surely, 2^87684420 is an apocalyptic number.

It is an amenable number.

87684420 is an abundant number, since it is smaller than the sum of its proper divisors (157832124).

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

87684420 is a wasteful number, since it uses less digits than its factorization.

87684420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461419 (or 1461417 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 87684420 is about 9363.9959419043. The cubic root of 87684420 is about 444.2636815370.

The spelling of 87684420 in words is "eighty-seven million, six hundred eighty-four thousand, four hundred twenty".