22378488 has 128 divisors (see below), whose sum is σ = 65664000. Its totient is φ = 6289920.

The previous prime is 22378487. The next prime is 22378507. The reversal of 22378488 is 88487322.

It is a super-2 number, since 2×22378488² = 1001593450332288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22378481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283233 + ... + 283311.

It is an arithmetic number, because the mean of its divisors is an integer number (513000).

Almost surely, 2^22378488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22378488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32832000).

22378488 is an abundant number, since it is smaller than the sum of its proper divisors (43285512).

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

22378488 is a wasteful number, since it uses less digits than its factorization.

22378488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 161 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The square root of 22378488 is about 4730.5906607949. The cubic root of 22378488 is about 281.8016813976.

The spelling of 22378488 in words is "twenty-two million, three hundred seventy-eight thousand, four hundred eighty-eight".