28451592977 has 32 divisors (see below), whose sum is σ = 30904584480. Its totient is φ = 26140907520.

The previous prime is 28451592937. The next prime is 28451593007. The reversal of 28451592977 is 77929515482.

It is a Cunningham number, because it is equal to 168676²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 7940770321 + 20510822656 = 89111^2 + 143216^2 .

It is a cyclic number.

It is not a de Polignac number, because 28451592977 - 2¹⁶ = 28451527441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28451592937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6842183 + ... + 6846339.

It is an arithmetic number, because the mean of its divisors is an integer number (965768265).

Almost surely, 2^28451592977 is an apocalyptic number.

It is an amenable number.

28451592977 is a deficient number, since it is larger than the sum of its proper divisors (2452991503).

28451592977 is a wasteful number, since it uses less digits than its factorization.

28451592977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373.

The product of its digits is 12700800, while the sum is 59.

The spelling of 28451592977 in words is "twenty-eight billion, four hundred fifty-one million, five hundred ninety-two thousand, nine hundred seventy-seven".