22494780 has 192 divisors, whose sum is σ = 87413760. Its totient is φ = 4665600.

The previous prime is 22494767. The next prime is 22494793. The reversal of 22494780 is 8749422.

It is an interprime number because it is at equal distance from previous prime (22494767) and next prime (22494793).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41310 + ... + 41850.

It is an arithmetic number, because the mean of its divisors is an integer number (455280).

Almost surely, 2^22494780 is an apocalyptic number.

22494780 is a gapful number since it is divisible by the number (20) 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 22494780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43706880).

22494780 is an abundant number, since it is smaller than the sum of its proper divisors (64918980).

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

22494780 is a wasteful number, since it uses less digits than its factorization.

22494780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 22494780 is about 4742.8662220223. The cubic root of 22494780 is about 282.2889749399.

The spelling of 22494780 in words is "twenty-two million, four hundred ninety-four thousand, seven hundred eighty".