28406487397 has 8 divisors (see below), whose sum is σ = 28573924896. Its totient is φ = 28239421392.

The previous prime is 28406487371. The next prime is 28406487443. The reversal of 28406487397 is 79378460482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28406487397 - 2²³ = 28398098789 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 (28406487367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61258 + ... + 246100.

It is an arithmetic number, because the mean of its divisors is an integer number (3571740612).

Almost surely, 2^28406487397 is an apocalyptic number.

It is an amenable number.

28406487397 is a deficient number, since it is larger than the sum of its proper divisors (167437499).

28406487397 is a wasteful number, since it uses less digits than its factorization.

28406487397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185747.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The spelling of 28406487397 in words is "twenty-eight billion, four hundred six million, four hundred eighty-seven thousand, three hundred ninety-seven".