28874457401 has 2 divisors, whose sum is σ = 28874457402. Its totient is φ = 28874457400.

The previous prime is 28874457389. The next prime is 28874457461. The reversal of 28874457401 is 10475447882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27142233001 + 1732224400 = 164749^2 + 41620^2 .

It is a cyclic number.

It is not a de Polignac number, because 28874457401 - 2³⁰ = 27800715577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28874457401.

It is not a weakly prime, because it can be changed into another prime (28874457461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437228700 + 14437228701.

It is an arithmetic number, because the mean of its divisors is an integer number (14437228701).

Almost surely, 2^28874457401 is an apocalyptic number.

It is an amenable number.

28874457401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28874457401 is an equidigital number, since it uses as much as digits as its factorization.

28874457401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2007040, while the sum is 50.

The spelling of 28874457401 in words is "twenty-eight billion, eight hundred seventy-four million, four hundred fifty-seven thousand, four hundred one".