22613778 has 48 divisors (see below), whose sum is σ = 53831232. Its totient is φ = 6804000.

The previous prime is 22613777. The next prime is 22613779. The reversal of 22613778 is 87731622.

It is an interprime number because it is at equal distance from previous prime (22613777) and next prime (22613779).

It is a super-2 number, since 2×22613778² = 1022765910866568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22613777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35523 + ... + 36153.

It is an arithmetic number, because the mean of its divisors is an integer number (1121484).

Almost surely, 2^22613778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22613778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26915616).

22613778 is an abundant number, since it is smaller than the sum of its proper divisors (31217454).

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

22613778 is a wasteful number, since it uses less digits than its factorization.

22613778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 828 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 22613778 is about 4755.3946208490. The cubic root of 22613778 is about 282.7858718944.

The spelling of 22613778 in words is "twenty-two million, six hundred thirteen thousand, seven hundred seventy-eight".