87691242 has 16 divisors (see below), whose sum is σ = 176353632. Its totient is φ = 29068560.

The previous prime is 87691223. The next prime is 87691267. The reversal of 87691242 is 24219678.

It is a self number, because there is not a number n which added to its sum of digits gives 87691242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39288 + ... + 41459.

It is an arithmetic number, because the mean of its divisors is an integer number (11022102).

Almost surely, 2^87691242 is an apocalyptic number.

87691242 is an abundant number, since it is smaller than the sum of its proper divisors (88662390).

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

87691242 is a wasteful number, since it uses less digits than its factorization.

87691242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80933.

The product of its digits is 48384, while the sum is 39.

The square root of 87691242 is about 9364.3602023844. The cubic root of 87691242 is about 444.2752027333.

It can be divided in two parts, 8769 and 1242, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 87691242 in words is "eighty-seven million, six hundred ninety-one thousand, two hundred forty-two".