88690644 has 72 divisors (see below), whose sum is σ = 259878528. Its totient is φ = 24978240.

The previous prime is 88690643. The next prime is 88690661. The reversal of 88690644 is 44609688.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 88690644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88690643) 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, 15414 + ... + 20370.

It is an arithmetic number, because the mean of its divisors is an integer number (3609424).

Almost surely, 2^88690644 is an apocalyptic number.

88690644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88690644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129939264).

88690644 is an abundant number, since it is smaller than the sum of its proper divisors (171187884).

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

88690644 is a wasteful number, since it uses less digits than its factorization.

88690644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045 (or 5040 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 88690644 is about 9417.5710244203. The cubic root of 88690644 is about 445.9566072793.

The spelling of 88690644 in words is "eighty-eight million, six hundred ninety thousand, six hundred forty-four".