87243544 has 8 divisors (see below), whose sum is σ = 163581660. Its totient is φ = 43621768.

The previous prime is 87243509. The next prime is 87243547. The reversal of 87243544 is 44534278.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×87243544² = 15222871939359872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87243547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5452714 + ... + 5452729.

Almost surely, 2^87243544 is an apocalyptic number.

It is an amenable number.

87243544 is a deficient number, since it is larger than the sum of its proper divisors (76338116).

87243544 is a wasteful number, since it uses less digits than its factorization.

87243544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10905449 (or 10905445 counting only the distinct ones).

The product of its digits is 107520, while the sum is 37.

The square root of 87243544 is about 9340.4252579848. The cubic root of 87243544 is about 443.5178463246.

The spelling of 87243544 in words is "eighty-seven million, two hundred forty-three thousand, five hundred forty-four".