22140740 has 24 divisors (see below), whose sum is σ = 46737600. Its totient is φ = 8810208.

The previous prime is 22140709. The next prime is 22140773. The reversal of 22140740 is 4704122.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1199 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (1947400).

Almost surely, 2^22140740 is an apocalyptic number.

22140740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22140740 is an abundant number, since it is smaller than the sum of its proper divisors (24596860).

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

22140740 is a wasteful number, since it uses less digits than its factorization.

22140740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771 (or 5769 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22140740 is about 4705.3947762117. The cubic root of 22140740 is about 280.8001770818.

Adding to 22140740 its reverse (4704122), we get a palindrome (26844862).

The spelling of 22140740 in words is "twenty-two million, one hundred forty thousand, seven hundred forty".