87186442 has 8 divisors (see below), whose sum is σ = 149462496. Its totient is φ = 37365612.

The previous prime is 87186427. The next prime is 87186443. The reversal of 87186442 is 24468178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 87186395 and 87186404.

It is not an unprimeable number, because it can be changed into a prime (87186443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113788 + ... + 3113815.

It is an arithmetic number, because the mean of its divisors is an integer number (18682812).

Almost surely, 2^87186442 is an apocalyptic number.

87186442 is a deficient number, since it is larger than the sum of its proper divisors (62276054).

87186442 is a wasteful number, since it uses less digits than its factorization.

87186442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227612.

The product of its digits is 86016, while the sum is 40.

The square root of 87186442 is about 9337.3680445830. The cubic root of 87186442 is about 443.4210625312.

The spelling of 87186442 in words is "eighty-seven million, one hundred eighty-six thousand, four hundred forty-two".