87428633 has 4 divisors (see below), whose sum is σ = 92030160. Its totient is φ = 82827108.

The previous prime is 87428629. The next prime is 87428639. The reversal of 87428633 is 33682478.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87428633 - 2² = 87428629 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87428639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300735 + ... + 2300772.

It is an arithmetic number, because the mean of its divisors is an integer number (23007540).

Almost surely, 2^87428633 is an apocalyptic number.

It is an amenable number.

87428633 is a deficient number, since it is larger than the sum of its proper divisors (4601527).

87428633 is a wasteful number, since it uses less digits than its factorization.

87428633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601526.

The product of its digits is 193536, while the sum is 41.

The square root of 87428633 is about 9350.3279621626. The cubic root of 87428633 is about 443.8312689083.

The spelling of 87428633 in words is "eighty-seven million, four hundred twenty-eight thousand, six hundred thirty-three".