22320240 has 40 divisors (see below), whose sum is σ = 69193488. Its totient is φ = 5952000.

The previous prime is 22320223. The next prime is 22320241. The reversal of 22320240 is 4202322.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×22320240³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46261 + ... + 46740.

Almost surely, 2^22320240 is an apocalyptic number.

22320240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22320240 is an abundant number, since it is smaller than the sum of its proper divisors (46873248).

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

22320240 is a wasteful number, since it uses less digits than its factorization.

22320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93017 (or 93011 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22320240 is about 4724.4301243642. The cubic root of 22320240 is about 281.5569724849.

Adding to 22320240 its reverse (4202322), we get a palindrome (26522562).

The spelling of 22320240 in words is "twenty-two million, three hundred twenty thousand, two hundred forty".