163628238428 has 12 divisors (see below), whose sum is σ = 298799392080. Its totient is φ = 78256983552.

The previous prime is 163628238427. The next prime is 163628238443. The reversal of 163628238428 is 824832826361.

It is a super-2 number, since 2×163628238428² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163628238428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163628238427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889283813 + ... + 889283996.

It is an arithmetic number, because the mean of its divisors is an integer number (24899949340).

Almost surely, 2^163628238428 is an apocalyptic number.

It is an amenable number.

163628238428 is a deficient number, since it is larger than the sum of its proper divisors (135171153652).

163628238428 is a wasteful number, since it uses less digits than its factorization.

163628238428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778567836 (or 1778567834 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 53.

The spelling of 163628238428 in words is "one hundred sixty-three billion, six hundred twenty-eight million, two hundred thirty-eight thousand, four hundred twenty-eight".