22047740 has 72 divisors (see below), whose sum is σ = 54785808. Its totient is φ = 7388160.

The previous prime is 22047721. The next prime is 22047797. The reversal of 22047740 is 4774022.

It is a super-2 number, since 2×22047740² = 972205678215200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36884 + ... + 37476.

It is an arithmetic number, because the mean of its divisors is an integer number (760914).

Almost surely, 2^22047740 is an apocalyptic number.

22047740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22047740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27392904).

22047740 is an abundant number, since it is smaller than the sum of its proper divisors (32738068).

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

22047740 is a wasteful number, since it uses less digits than its factorization.

22047740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 22047740 is about 4695.5021030769. The cubic root of 22047740 is about 280.4064674811.

The spelling of 22047740 in words is "twenty-two million, forty-seven thousand, seven hundred forty".