28539449001 has 24 divisors (see below), whose sum is σ = 47153793024. Its totient is φ = 16294046400.

The previous prime is 28539448991. The next prime is 28539449021. The reversal of 28539449001 is 10094493582.

28539449001 is a `hidden beast` number, since 28 + 53 + 94 + 490 + 0 + 1 = 666.

It is not a de Polignac number, because 28539449001 - 2⁶ = 28539448937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28539449021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124276 + ... + 269301.

It is an arithmetic number, because the mean of its divisors is an integer number (1964741376).

Almost surely, 2^28539449001 is an apocalyptic number.

28539449001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28539449001 is a deficient number, since it is larger than the sum of its proper divisors (18614344023).

28539449001 is a wasteful number, since it uses less digits than its factorization.

28539449001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394741 (or 394738 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 28539449001 in words is "twenty-eight billion, five hundred thirty-nine million, four hundred forty-nine thousand, one".