22072428 has 36 divisors (see below), whose sum is σ = 63765520. Its totient is φ = 6306336.

The previous prime is 22072411. The next prime is 22072429. The reversal of 22072428 is 82427022.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (22072429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43543 + ... + 44046.

Almost surely, 2^22072428 is an apocalyptic number.

22072428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22072428 is an abundant number, since it is smaller than the sum of its proper divisors (41693092).

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

22072428 is a wasteful number, since it uses less digits than its factorization.

22072428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87606 (or 87601 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22072428 is about 4698.1302663932. The cubic root of 22072428 is about 280.5110903371.

It can be divided in two parts, 22072 and 428, that added together give a square (22500 = 150²).

The spelling of 22072428 in words is "twenty-two million, seventy-two thousand, four hundred twenty-eight".