88646778 has 48 divisors (see below), whose sum is σ = 216545280. Its totient is φ = 26860680.

The previous prime is 88646777. The next prime is 88646827. The reversal of 88646778 is 87764688.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (88646777) 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, 250 + ... + 13317.

It is an arithmetic number, because the mean of its divisors is an integer number (4511360).

Almost surely, 2^88646778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88646778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108272640).

88646778 is an abundant number, since it is smaller than the sum of its proper divisors (127898502).

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

88646778 is a wasteful number, since it uses less digits than its factorization.

88646778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13600 (or 13583 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 88646778 is about 9415.2417919032. The cubic root of 88646778 is about 445.8830724332.

The spelling of 88646778 in words is "eighty-eight million, six hundred forty-six thousand, seven hundred seventy-eight".