28062532381 has 8 divisors (see below), whose sum is σ = 30338784504. Its totient is φ = 25803079680.

The previous prime is 28062532361. The next prime is 28062532409. The reversal of 28062532381 is 18323526082.

It can be written as a sum of positive squares in 4 ways, for example, as 1147176900 + 26915355481 = 33870^2 + 164059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28062532381 - 2⁹ = 28062531869 is a prime.

It is a super-2 number, since 2×28062532381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28062532301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196380 + ... + 4203061.

It is an arithmetic number, because the mean of its divisors is an integer number (3792348063).

Almost surely, 2^28062532381 is an apocalyptic number.

It is an amenable number.

28062532381 is a deficient number, since it is larger than the sum of its proper divisors (2276252123).

28062532381 is a wasteful number, since it uses less digits than its factorization.

28062532381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8399711.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 28062532381 in words is "twenty-eight billion, sixty-two million, five hundred thirty-two thousand, three hundred eighty-one".