22701640 has 64 divisors (see below), whose sum is σ = 55566000. Its totient is φ = 8297472.

The previous prime is 22701617. The next prime is 22701643. The reversal of 22701640 is 4610722.

It can be written as a sum of positive squares in 8 ways, for example, as 6749604 + 15952036 = 2598^2 + 3994^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22701643) 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 15 ways as a sum of consecutive naturals, for example, 77334 + ... + 77626.

Almost surely, 2^22701640 is an apocalyptic number.

22701640 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 22701640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27783000).

22701640 is an abundant number, since it is smaller than the sum of its proper divisors (32864360).

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

22701640 is a wasteful number, since it uses less digits than its factorization.

22701640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 22701640 is about 4764.6238046671. The cubic root of 22701640 is about 283.1516374478.

The spelling of 22701640 in words is "twenty-two million, seven hundred one thousand, six hundred forty".