87856845 has 16 divisors (see below), whose sum is σ = 141096192. Its totient is φ = 46681920.

The previous prime is 87856843. The next prime is 87856859. The reversal of 87856845 is 54865878.

It is not a de Polignac number, because 87856845 - 2¹ = 87856843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87856843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6742 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (8818512).

Almost surely, 2^87856845 is an apocalyptic number.

It is an amenable number.

87856845 is a deficient number, since it is larger than the sum of its proper divisors (53239347).

87856845 is a wasteful number, since it uses less digits than its factorization.

87856845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21892.

The product of its digits is 2150400, while the sum is 51.

The square root of 87856845 is about 9373.1982268594. The cubic root of 87856845 is about 444.5546948824.

The spelling of 87856845 in words is "eighty-seven million, eight hundred fifty-six thousand, eight hundred forty-five".