87777080 has 32 divisors (see below), whose sum is σ = 199463040. Its totient is φ = 34761600.

The previous prime is 87777077. The next prime is 87777083. The reversal of 87777080 is 8077778.

It is an interprime number because it is at equal distance from previous prime (87777077) and next prime (87777083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87777083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6824 + ... + 14903.

It is an arithmetic number, because the mean of its divisors is an integer number (6233220).

Almost surely, 2^87777080 is an apocalyptic number.

It is an amenable number.

87777080 is an abundant number, since it is smaller than the sum of its proper divisors (111685960).

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

87777080 is a wasteful number, since it uses less digits than its factorization.

87777080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839 (or 21835 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 87777080 is about 9368.9423095673. The cubic root of 87777080 is about 444.4201174648.

The spelling of 87777080 in words is "eighty-seven million, seven hundred seventy-seven thousand, eighty".