87561428 has 24 divisors (see below), whose sum is σ = 156461760. Its totient is φ = 42864320.

The previous prime is 87561403. The next prime is 87561449. The reversal of 87561428 is 82416578.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 72800 + ... + 73992.

It is an arithmetic number, because the mean of its divisors is an integer number (6519240).

Almost surely, 2^87561428 is an apocalyptic number.

It is an amenable number.

87561428 is a deficient number, since it is larger than the sum of its proper divisors (68900332).

87561428 is a wasteful number, since it uses less digits than its factorization.

87561428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567 (or 1565 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 87561428 is about 9357.4263555745. The cubic root of 87561428 is about 444.0558664113.

The spelling of 87561428 in words is "eighty-seven million, five hundred sixty-one thousand, four hundred twenty-eight".