87185144 has 32 divisors (see below), whose sum is σ = 169430400. Its totient is φ = 42015360.

The previous prime is 87185143. The next prime is 87185149. The reversal of 87185144 is 44158178.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 87185098 and 87185107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87185143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78062 + ... + 79170.

It is an arithmetic number, because the mean of its divisors is an integer number (5294700).

Almost surely, 2^87185144 is an apocalyptic number.

It is an amenable number.

87185144 is a deficient number, since it is larger than the sum of its proper divisors (82245256).

87185144 is a wasteful number, since it uses less digits than its factorization.

87185144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1459 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 87185144 is about 9337.2985386567. The cubic root of 87185144 is about 443.4188620232.

The spelling of 87185144 in words is "eighty-seven million, one hundred eighty-five thousand, one hundred forty-four".