87428673 has 8 divisors (see below), whose sum is σ = 129524000. Its totient is φ = 58285764.

The previous prime is 87428647. The next prime is 87428683. The reversal of 87428673 is 37682478.

It is a happy number.

It is not a de Polignac number, because 87428673 - 2¹³ = 87420481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87428623) 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 7 ways as a sum of consecutive naturals, for example, 1619023 + ... + 1619076.

It is an arithmetic number, because the mean of its divisors is an integer number (16190500).

Almost surely, 2^87428673 is an apocalyptic number.

It is an amenable number.

87428673 is a deficient number, since it is larger than the sum of its proper divisors (42095327).

87428673 is a wasteful number, since it uses less digits than its factorization.

87428673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238108 (or 3238102 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 87428673 is about 9350.3301011248. The cubic root of 87428673 is about 443.8313365949.

The spelling of 87428673 in words is "eighty-seven million, four hundred twenty-eight thousand, six hundred seventy-three".