84187664 has 20 divisors (see below), whose sum is σ = 177942480. Its totient is φ = 38267040.

The previous prime is 84187657. The next prime is 84187673. The reversal of 84187664 is 46678148.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 238994 + ... + 239345.

It is an arithmetic number, because the mean of its divisors is an integer number (8897124).

Almost surely, 2^84187664 is an apocalyptic number.

It is an amenable number.

84187664 is an abundant number, since it is smaller than the sum of its proper divisors (93754816).

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

84187664 is a wasteful number, since it uses less digits than its factorization.

84187664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478358 (or 478352 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 84187664 is about 9175.3835887117. The cubic root of 84187664 is about 438.2778135075.

The spelling of 84187664 in words is "eighty-four million, one hundred eighty-seven thousand, six hundred sixty-four".