87229961928 has 36 divisors (see below), whose sum is σ = 236254601115. Its totient is φ = 29075818608.

The previous prime is 87229961887. The next prime is 87229961933. The reversal of 87229961928 is 82916992278.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

87229961928 is a `hidden beast` number, since 8 + 7 + 2 + 2 + 9 + 9 + 619 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43614980964 + 43614980964 = 208842^2 + 208842^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=208842.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2488701 + ... + 2523507.

Almost surely, 2^87229961928 is an apocalyptic number.

It is an amenable number.

87229961928 is an abundant number, since it is smaller than the sum of its proper divisors (149024639187).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87229961928 is an frugal number, since it uses more digits than its factorization.

87229961928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69626 (or 34812 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 87229961928 in words is "eighty-seven billion, two hundred twenty-nine million, nine hundred sixty-one thousand, nine hundred twenty-eight".