88400779 has 4 divisors (see below), whose sum is σ = 88430776. Its totient is φ = 88370784.

The previous prime is 88400777. The next prime is 88400783. The reversal of 88400779 is 97700488.

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

It is a cyclic number.

It is not a de Polignac number, because 88400779 - 2¹ = 88400777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88400777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10029 + ... + 16654.

It is an arithmetic number, because the mean of its divisors is an integer number (22107694).

Almost surely, 2^88400779 is an apocalyptic number.

88400779 is a deficient number, since it is larger than the sum of its proper divisors (29997).

88400779 is a wasteful number, since it uses less digits than its factorization.

88400779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29996.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 88400779 is about 9402.1688455377. The cubic root of 88400779 is about 445.4702414534.

The spelling of 88400779 in words is "eighty-eight million, four hundred thousand, seven hundred seventy-nine".