22398240 has 48 divisors (see below), whose sum is σ = 70555968. Its totient is φ = 5972736.

The previous prime is 22398239. The next prime is 22398247. The reversal of 22398240 is 4289322.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22398198 and 22398207.

It is not an unprimeable number, because it can be changed into a prime (22398247) 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, 22852 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (1469916).

Almost surely, 2^22398240 is an apocalyptic number.

22398240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22398240 is an abundant number, since it is smaller than the sum of its proper divisors (48157728).

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

22398240 is a wasteful number, since it uses less digits than its factorization.

22398240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46681 (or 46673 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 22398240 is about 4732.6778888912. The cubic root of 22398240 is about 281.8845662048.

The spelling of 22398240 in words is "twenty-two million, three hundred ninety-eight thousand, two hundred forty".