87775554 has 16 divisors (see below), whose sum is σ = 184790880. Its totient is φ = 27718560.

The previous prime is 87775543. The next prime is 87775559. The reversal of 87775554 is 45557778.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87775559) 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, 384867 + ... + 385094.

It is an arithmetic number, because the mean of its divisors is an integer number (11549430).

Almost surely, 2^87775554 is an apocalyptic number.

87775554 is an abundant number, since it is smaller than the sum of its proper divisors (97015326).

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

87775554 is a wasteful number, since it uses less digits than its factorization.

87775554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769985.

The product of its digits is 1372000, while the sum is 48.

The square root of 87775554 is about 9368.8608699244. The cubic root of 87775554 is about 444.4175420429.

The spelling of 87775554 in words is "eighty-seven million, seven hundred seventy-five thousand, five hundred fifty-four".