22273840 has 40 divisors (see below), whose sum is σ = 51983280. Its totient is φ = 8875776.

The previous prime is 22273837. The next prime is 22273877. The reversal of 22273840 is 4837222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22273840² = 992247896691200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22273799 and 22273808.

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, 40447 + ... + 40993.

It is an arithmetic number, because the mean of its divisors is an integer number (1299582).

Almost surely, 2^22273840 is an apocalyptic number.

22273840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22273840 is an abundant number, since it is smaller than the sum of its proper divisors (29709440).

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

22273840 is a wasteful number, since it uses less digits than its factorization.

22273840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 22273840 is about 4719.5169244320. The cubic root of 22273840 is about 281.3617340410.

It can be divided in two parts, 222738 and 40, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 22273840 in words is "twenty-two million, two hundred seventy-three thousand, eight hundred forty".