87569378 has 18 divisors (see below), whose sum is σ = 142515459. Its totient is φ = 40337232.

The previous prime is 87569351. The next prime is 87569387. The reversal of 87569378 is 87396578.

It can be written as a sum of positive squares in 5 ways, for example, as 39225169 + 48344209 = 6263^2 + 6953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6617.

It is a Duffinian number.

It is an unprimeable number.

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 in 8 ways as a sum of consecutive naturals, for example, 171788 + ... + 172296.

Almost surely, 2^87569378 is an apocalyptic number.

87569378 is a deficient number, since it is larger than the sum of its proper divisors (54946081).

87569378 is an equidigital number, since it uses as much as digits as its factorization.

87569378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 524 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The square root of 87569378 is about 9357.8511422228. The cubic root of 87569378 is about 444.0693051190.

The spelling of 87569378 in words is "eighty-seven million, five hundred sixty-nine thousand, three hundred seventy-eight".