1622563728 has 20 divisors (see below), whose sum is σ = 4191623088. Its totient is φ = 540854560.

The previous prime is 1622563697. The next prime is 1622563739. The reversal of 1622563728 is 8273652261.

It is a self number, because there is not a number n which added to its sum of digits gives 1622563728.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16901658 + ... + 16901753.

Almost surely, 2^1622563728 is an apocalyptic number.

It is an amenable number.

1622563728 is an abundant number, since it is smaller than the sum of its proper divisors (2569059360).

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

1622563728 is a wasteful number, since it uses less digits than its factorization.

1622563728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33803422 (or 33803416 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 1622563728 is about 40281.0591717745. The cubic root of 1622563728 is about 1175.0795124705.

The spelling of 1622563728 in words is "one billion, six hundred twenty-two million, five hundred sixty-three thousand, seven hundred twenty-eight".