87778607 has 16 divisors (see below), whose sum is σ = 102539520. Its totient is φ = 73586688.

The previous prime is 87778589. The next prime is 87778637. The reversal of 87778607 is 70687778.

It is a de Polignac number, because none of the positive numbers 2^k-87778607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87778637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105728 + ... + 106554.

It is an arithmetic number, because the mean of its divisors is an integer number (6408720).

Almost surely, 2^87778607 is an apocalyptic number.

87778607 is a deficient number, since it is larger than the sum of its proper divisors (14760913).

87778607 is a wasteful number, since it uses less digits than its factorization.

87778607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150.

The product of its (nonzero) digits is 921984, while the sum is 50.

The square root of 87778607 is about 9369.0238018696. The cubic root of 87778607 is about 444.4226945444.

The spelling of 87778607 in words is "eighty-seven million, seven hundred seventy-eight thousand, six hundred seven".