87775428 has 24 divisors (see below), whose sum is σ = 220564288. Its totient is φ = 27007776.

The previous prime is 87775423. The next prime is 87775451. The reversal of 87775428 is 82457778.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87775423) 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 7 ways as a sum of consecutive naturals, for example, 281176 + ... + 281487.

Almost surely, 2^87775428 is an apocalyptic number.

It is an amenable number.

87775428 is an abundant number, since it is smaller than the sum of its proper divisors (132788860).

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

87775428 is a wasteful number, since it uses less digits than its factorization.

87775428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562683 (or 562681 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 87775428 is about 9368.8541455185. The cubic root of 87775428 is about 444.4173293921.

The spelling of 87775428 in words is "eighty-seven million, seven hundred seventy-five thousand, four hundred twenty-eight".