87428437 has 4 divisors (see below), whose sum is σ = 87467596. Its totient is φ = 87389280.

The previous prime is 87428389. The next prime is 87428459. The reversal of 87428437 is 73482478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12068676 + 75359761 = 3474^2 + 8681^2 .

It is a cyclic number.

It is not a de Polignac number, because 87428437 - 2¹¹ = 87426389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87428393 and 87428402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87429437) 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 in 3 ways as a sum of consecutive naturals, for example, 16014 + ... + 20767.

It is an arithmetic number, because the mean of its divisors is an integer number (21866899).

Almost surely, 2^87428437 is an apocalyptic number.

It is an amenable number.

87428437 is a deficient number, since it is larger than the sum of its proper divisors (39159).

87428437 is a wasteful number, since it uses less digits than its factorization.

87428437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39158.

The product of its digits is 301056, while the sum is 43.

The square root of 87428437 is about 9350.3174812409. The cubic root of 87428437 is about 443.8309372435.

The spelling of 87428437 in words is "eighty-seven million, four hundred twenty-eight thousand, four hundred thirty-seven".