87777642 has 8 divisors (see below), whose sum is σ = 175555296. Its totient is φ = 29259212.

The previous prime is 87777629. The next prime is 87777649. The reversal of 87777642 is 24677778.

It is a sphenic number, since it is the product of 3 distinct primes.

87777642 is an admirable number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 87777591 and 87777600.

It is not an unprimeable number, because it can be changed into a prime (87777649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7314798 + ... + 7314809.

It is an arithmetic number, because the mean of its divisors is an integer number (21944412).

Almost surely, 2^87777642 is an apocalyptic number.

87777642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87777642 is a wasteful number, since it uses less digits than its factorization.

87777642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14629612.

The product of its digits is 921984, while the sum is 48.

The square root of 87777642 is about 9368.9723022325. The cubic root of 87777642 is about 444.4210659416.

The spelling of 87777642 in words is "eighty-seven million, seven hundred seventy-seven thousand, six hundred forty-two".