28774404398407 has 16 divisors (see below), whose sum is σ = 29913378566400. Its totient is φ = 27648745977600.

The previous prime is 28774404398387. The next prime is 28774404398447. The reversal of 28774404398407 is 70489340447782.

It is a cyclic number.

It is not a de Polignac number, because 28774404398407 - 2³¹ = 28772256914759 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 (28774404398447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10918003 + ... + 13294795.

It is an arithmetic number, because the mean of its divisors is an integer number (1869586160400).

Almost surely, 2^{28774404398407} is an apocalyptic number.

28774404398407 is a deficient number, since it is larger than the sum of its proper divisors (1138974167993).

28774404398407 is a wasteful number, since it uses less digits than its factorization.

28774404398407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379594.

The product of its (nonzero) digits is 303464448, while the sum is 67.

The spelling of 28774404398407 in words is "twenty-eight trillion, seven hundred seventy-four billion, four hundred four million, three hundred ninety-eight thousand, four hundred seven".