87777774 has 48 divisors (see below), whose sum is σ = 217875840. Its totient is φ = 25019280.

The previous prime is 87777773. The next prime is 87777799. The reversal of 87777774 is 47777778.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 87777774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87777773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101757 + ... + 102615.

It is an arithmetic number, because the mean of its divisors is an integer number (4539080).

Almost surely, 2^87777774 is an apocalyptic number.

87777774 is an abundant number, since it is smaller than the sum of its proper divisors (130098066).

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

87777774 is a wasteful number, since it uses less digits than its factorization.

87777774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1682 counting only the distinct ones).

The product of its digits is 3764768, while the sum is 54.

The square root of 87777774 is about 9368.9793467592. The cubic root of 87777774 is about 444.4212887149.

The spelling of 87777774 in words is "eighty-seven million, seven hundred seventy-seven thousand, seven hundred seventy-four".