22473640 has 32 divisors (see below), whose sum is σ = 57790080. Its totient is φ = 7705152.

The previous prime is 22473601. The next prime is 22473653. The reversal of 22473640 is 4637422.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22473599 and 22473608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39852 + ... + 40411.

It is an arithmetic number, because the mean of its divisors is an integer number (1805940).

Almost surely, 2^22473640 is an apocalyptic number.

22473640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22473640 is an abundant number, since it is smaller than the sum of its proper divisors (35316440).

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

22473640 is a wasteful number, since it uses less digits than its factorization.

22473640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80281 (or 80277 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 22473640 is about 4740.6370879872. The cubic root of 22473640 is about 282.2005179838.

The spelling of 22473640 in words is "twenty-two million, four hundred seventy-three thousand, six hundred forty".