22473240 has 32 divisors (see below), whose sum is σ = 67420080. Its totient is φ = 5992832.

The previous prime is 22473239. The next prime is 22473247. The reversal of 22473240 is 4237422.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22473240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22473247) 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, 93519 + ... + 93758.

Almost surely, 2^22473240 is an apocalyptic number.

22473240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22473240 is an abundant number, since it is smaller than the sum of its proper divisors (44946840).

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

22473240 is a wasteful number, since it uses less digits than its factorization.

22473240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187291 (or 187287 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 22473240 is about 4740.5948993771. The cubic root of 22473240 is about 282.1988437130.

The spelling of 22473240 in words is "twenty-two million, four hundred seventy-three thousand, two hundred forty".