87809748 has 48 divisors (see below), whose sum is σ = 221370240. Its totient is φ = 26930304.

The previous prime is 87809719. The next prime is 87809749. The reversal of 87809748 is 84790878.

It is a self number, because there is not a number n which added to its sum of digits gives 87809748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87809749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59961 + ... + 61407.

It is an arithmetic number, because the mean of its divisors is an integer number (4611880).

Almost surely, 2^87809748 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 87809748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110685120).

87809748 is an abundant number, since it is smaller than the sum of its proper divisors (133560492).

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

87809748 is a wasteful number, since it uses less digits than its factorization.

87809748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 87809748 is about 9370.6855672357. The cubic root of 87809748 is about 444.4752439119.

It can be divided in two parts, 8780 and 9748, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 87809748 in words is "eighty-seven million, eight hundred nine thousand, seven hundred forty-eight".