87439870 has 16 divisors (see below), whose sum is σ = 179876448. Its totient is φ = 29979360.

The previous prime is 87439867. The next prime is 87439879. The reversal of 87439870 is 7893478.

It is a self number, because there is not a number n which added to its sum of digits gives 87439870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87439879) 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 7 ways as a sum of consecutive naturals, for example, 624501 + ... + 624640.

It is an arithmetic number, because the mean of its divisors is an integer number (11242278).

Almost surely, 2^87439870 is an apocalyptic number.

87439870 is an abundant number, since it is smaller than the sum of its proper divisors (92436578).

87439870 is a wasteful number, since it uses less digits than its factorization.

87439870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249155.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 87439870 is about 9350.9288308702. The cubic root of 87439870 is about 443.8502829626.

The spelling of 87439870 in words is "eighty-seven million, four hundred thirty-nine thousand, eight hundred seventy".