22779240 has 64 divisors (see below), whose sum is σ = 74554560. Its totient is φ = 5521920.

The previous prime is 22779221. The next prime is 22779247. The reversal of 22779240 is 4297722.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (22779247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7309 + ... + 9948.

It is an arithmetic number, because the mean of its divisors is an integer number (1164915).

Almost surely, 2^22779240 is an apocalyptic number.

22779240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22779240 is an abundant number, since it is smaller than the sum of its proper divisors (51775320).

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

22779240 is a wasteful number, since it uses less digits than its factorization.

22779240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17282 (or 17278 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 22779240 is about 4772.7602076786. The cubic root of 22779240 is about 283.4738987258.

The spelling of 22779240 in words is "twenty-two million, seven hundred seventy-nine thousand, two hundred forty".