87771772 has 48 divisors (see below), whose sum is σ = 179004672. Its totient is φ = 37255680.

The previous prime is 87771767. The next prime is 87771781. The reversal of 87771772 is 27717778.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42508 + ... + 44524.

It is an arithmetic number, because the mean of its divisors is an integer number (3729264).

Almost surely, 2^87771772 is an apocalyptic number.

It is an amenable number.

87771772 is an abundant number, since it is smaller than the sum of its proper divisors (91232900).

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

87771772 is a wasteful number, since it uses less digits than its factorization.

87771772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2096 counting only the distinct ones).

The product of its digits is 268912, while the sum is 46.

The square root of 87771772 is about 9368.6590289112. The cubic root of 87771772 is about 444.4111590535.

The spelling of 87771772 in words is "eighty-seven million, seven hundred seventy-one thousand, seven hundred seventy-two".