88768781 has 4 divisors (see below), whose sum is σ = 93990492. Its totient is φ = 83547072.

The previous prime is 88768763. The next prime is 88768787. The reversal of 88768781 is 18786788.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81613156 + 7155625 = 9034^2 + 2675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88768781 is a prime.

It is a super-2 number, since 2×88768781² = 15759792960451922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88768787) 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, 2610830 + ... + 2610863.

It is an arithmetic number, because the mean of its divisors is an integer number (23497623).

Almost surely, 2^88768781 is an apocalyptic number.

It is an amenable number.

88768781 is a deficient number, since it is larger than the sum of its proper divisors (5221711).

88768781 is a wasteful number, since it uses less digits than its factorization.

88768781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221710.

The product of its digits is 1204224, while the sum is 53.

The square root of 88768781 is about 9421.7185799619. The cubic root of 88768781 is about 446.0875323381.

The spelling of 88768781 in words is "eighty-eight million, seven hundred sixty-eight thousand, seven hundred eighty-one".