22461140 has 24 divisors (see below), whose sum is σ = 50797320. Its totient is φ = 8293248.

The previous prime is 22461139. The next prime is 22461157. The reversal of 22461140 is 4116422.

It can be written as a sum of positive squares in 4 ways, for example, as 521284 + 21939856 = 722^2 + 4684^2 .

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

It is a congruent number.

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, 42935 + ... + 43454.

It is an arithmetic number, because the mean of its divisors is an integer number (2116555).

Almost surely, 2^22461140 is an apocalyptic number.

22461140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22461140 is an abundant number, since it is smaller than the sum of its proper divisors (28336180).

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

22461140 is a wasteful number, since it uses less digits than its factorization.

22461140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86411 (or 86409 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22461140 is about 4739.3185164114. The cubic root of 22461140 is about 282.1481876287.

Adding to 22461140 its reverse (4116422), we get a palindrome (26577562).

The spelling of 22461140 in words is "twenty-two million, four hundred sixty-one thousand, one hundred forty".