22451428 has 6 divisors (see below), whose sum is σ = 39290006. Its totient is φ = 11225712.

The previous prime is 22451413. The next prime is 22451437. The reversal of 22451428 is 82415422.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 996004 = 4632^2 + 998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22451396 and 22451405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2806425 + ... + 2806432.

Almost surely, 2^22451428 is an apocalyptic number.

It is an amenable number.

22451428 is a deficient number, since it is larger than the sum of its proper divisors (16838578).

22451428 is a wasteful number, since it uses less digits than its factorization.

22451428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612861 (or 5612859 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 22451428 is about 4738.2937857419. The cubic root of 22451428 is about 282.1075156319.

The spelling of 22451428 in words is "twenty-two million, four hundred fifty-one thousand, four hundred twenty-eight".