28455739391 has 16 divisors (see below), whose sum is σ = 30635369568. Its totient is φ = 26332646400.

The previous prime is 28455739373. The next prime is 28455739409. The reversal of 28455739391 is 19393755482.

It is an interprime number because it is at equal distance from previous prime (28455739373) and next prime (28455739409).

It is not a de Polignac number, because 28455739391 - 2⁶ = 28455739327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455735391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4645811 + ... + 4651931.

It is an arithmetic number, because the mean of its divisors is an integer number (1914710598).

Almost surely, 2^28455739391 is an apocalyptic number.

28455739391 is a deficient number, since it is larger than the sum of its proper divisors (2179630177).

28455739391 is a wasteful number, since it uses less digits than its factorization.

28455739391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682.

The product of its digits is 8164800, while the sum is 56.

The spelling of 28455739391 in words is "twenty-eight billion, four hundred fifty-five million, seven hundred thirty-nine thousand, three hundred ninety-one".