28324553401 has 27 divisors (see below), whose sum is σ = 30093473709. Its totient is φ = 26658561600.

The previous prime is 28324553399. The next prime is 28324553419. The reversal of 28324553401 is 10435542382.

The square root of 28324553401 is 168299.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 18360521001 + 9964032400 = 135501^2 + 99820^2 .

It is not a de Polignac number, because 28324553401 - 2¹ = 28324553399 is a prime.

It is a super-2 number, since 2×28324553401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28324553801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 318253365 + ... + 318253453.

Almost surely, 2^28324553401 is an apocalyptic number.

28324553401 is the 168299-th square number.

28324553401 is the 84150-th centered octagonal number.

It is an amenable number.

28324553401 is a deficient number, since it is larger than the sum of its proper divisors (1768920308).

28324553401 is an frugal number, since it uses more digits than its factorization.

28324553401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

It can be divided in two parts, 2832455 and 3401, that added together give a square (2835856 = 1684²).

The spelling of 28324553401 in words is "twenty-eight billion, three hundred twenty-four million, five hundred fifty-three thousand, four hundred one".