28738472405 has 4 divisors (see below), whose sum is σ = 34486166892. Its totient is φ = 22990777920.

The previous prime is 28738472393. The next prime is 28738472417. The reversal of 28738472405 is 50427483782.

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

It is an interprime number because it is at equal distance from previous prime (28738472393) and next prime (28738472417).

It can be written as a sum of positive squares in 2 ways, for example, as 5701911121 + 23036561284 = 75511^2 + 151778^2 .

It is not a de Polignac number, because 28738472405 - 2⁸ = 28738472149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2873847236 + ... + 2873847245.

It is an arithmetic number, because the mean of its divisors is an integer number (8621541723).

Almost surely, 2^28738472405 is an apocalyptic number.

It is an amenable number.

28738472405 is a deficient number, since it is larger than the sum of its proper divisors (5747694487).

28738472405 is an equidigital number, since it uses as much as digits as its factorization.

28738472405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747694486.

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 28738472405 in words is "twenty-eight billion, seven hundred thirty-eight million, four hundred seventy-two thousand, four hundred five".