22077440 has 168 divisors, whose sum is σ = 67235832. Its totient is φ = 6881280.

The previous prime is 22077437. The next prime is 22077443. The reversal of 22077440 is 4477022.

It is an interprime number because it is at equal distance from previous prime (22077437) and next prime (22077443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22077443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2007035 + ... + 2007045.

Almost surely, 2^22077440 is an apocalyptic number.

22077440 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 22077440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33617916).

22077440 is an abundant number, since it is smaller than the sum of its proper divisors (45158392).

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

22077440 is an equidigital number, since it uses as much as digits as its factorization.

22077440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 22077440 is about 4698.6636398023. The cubic root of 22077440 is about 280.5323206731.

The spelling of 22077440 in words is "twenty-two million, seventy-seven thousand, four hundred forty".