22820072 has 32 divisors (see below), whose sum is σ = 46936800. Its totient is φ = 10315200.

The previous prime is 22820053. The next prime is 22820081. The reversal of 22820072 is 27002822.

It is a happy 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, 17954 + ... + 19182.

It is an arithmetic number, because the mean of its divisors is an integer number (1466775).

Almost surely, 2^22820072 is an apocalyptic number.

22820072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22820072 is an abundant number, since it is smaller than the sum of its proper divisors (24116728).

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

22820072 is a wasteful number, since it uses less digits than its factorization.

22820072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 22820072 is about 4777.0359010583. The cubic root of 22820072 is about 283.6431741586.

Adding to 22820072 its reverse (27002822), we get a palindrome (49822894).

The spelling of 22820072 in words is "twenty-two million, eight hundred twenty thousand, seventy-two".