28279553401 has 4 divisors (see below), whose sum is σ = 30850421904. Its totient is φ = 25708684900.

The previous prime is 28279553353. The next prime is 28279553417. The reversal of 28279553401 is 10435597282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28279553401 - 2¹³ = 28279545209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28279553441) 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, 1285434235 + ... + 1285434256.

It is an arithmetic number, because the mean of its divisors is an integer number (7712605476).

Almost surely, 2^28279553401 is an apocalyptic number.

It is an amenable number.

28279553401 is a deficient number, since it is larger than the sum of its proper divisors (2570868503).

28279553401 is a wasteful number, since it uses less digits than its factorization.

28279553401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570868502.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 28279553401 in words is "twenty-eight billion, two hundred seventy-nine million, five hundred fifty-three thousand, four hundred one".