28468250977 has 4 divisors (see below), whose sum is σ = 28468646596. Its totient is φ = 28467855360.

The previous prime is 28468250969. The next prime is 28468250999. The reversal of 28468250977 is 77905286482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7444410961 + 21023840016 = 86281^2 + 144996^2 .

It is a cyclic number.

It is not a de Polignac number, because 28468250977 - 2³ = 28468250969 is a prime.

It is a super-2 number, since 2×28468250977² (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 (28468250177) 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, 55968 + ... + 245089.

It is an arithmetic number, because the mean of its divisors is an integer number (7117161649).

Almost surely, 2^28468250977 is an apocalyptic number.

It is an amenable number.

28468250977 is a deficient number, since it is larger than the sum of its proper divisors (395619).

28468250977 is an equidigital number, since it uses as much as digits as its factorization.

28468250977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395618.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 28468250977 in words is "twenty-eight billion, four hundred sixty-eight million, two hundred fifty thousand, nine hundred seventy-seven".