87628825 has 12 divisors (see below), whose sum is σ = 109293228. Its totient is φ = 69694400.

The previous prime is 87628811. The next prime is 87628841. The reversal of 87628825 is 52882678.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4946176 + 82682649 = 2224^2 + 9093^2 .

It is not a de Polignac number, because 87628825 - 2⁹ = 87628313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5806 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (9107769).

Almost surely, 2^87628825 is an apocalyptic number.

It is an amenable number.

87628825 is a deficient number, since it is larger than the sum of its proper divisors (21664403).

87628825 is a wasteful number, since it uses less digits than its factorization.

87628825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20444 (or 20439 counting only the distinct ones).

The product of its digits is 430080, while the sum is 46.

The square root of 87628825 is about 9361.0269201621. The cubic root of 87628825 is about 444.1697687636.

The spelling of 87628825 in words is "eighty-seven million, six hundred twenty-eight thousand, eight hundred twenty-five".