87047744 has 56 divisors (see below), whose sum is σ = 199875648. Its totient is φ = 36840960.

The previous prime is 87047743. The next prime is 87047747. The reversal of 87047744 is 44774078.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (87047743) 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, 36014 + ... + 38354.

It is an arithmetic number, because the mean of its divisors is an integer number (3569208).

Almost surely, 2^87047744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87047744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99937824).

87047744 is an abundant number, since it is smaller than the sum of its proper divisors (112827904).

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

87047744 is a wasteful number, since it uses less digits than its factorization.

87047744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443 (or 2433 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 41.

The square root of 87047744 is about 9329.9380490976. The cubic root of 87047744 is about 443.1858032614.

The spelling of 87047744 in words is "eighty-seven million, forty-seven thousand, seven hundred forty-four".