28440461399 has 8 divisors (see below), whose sum is σ = 32505888768. Its totient is φ = 24375660120.

The previous prime is 28440461393. The next prime is 28440461411. The reversal of 28440461399 is 99316404482.

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

It is not a de Polignac number, because 28440461399 - 2⁴ = 28440461383 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 (28440461393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54767 + ... + 244704.

It is an arithmetic number, because the mean of its divisors is an integer number (4063236096).

Almost surely, 2^28440461399 is an apocalyptic number.

28440461399 is a deficient number, since it is larger than the sum of its proper divisors (4065427369).

28440461399 is a wasteful number, since it uses less digits than its factorization.

28440461399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313045.

The product of its (nonzero) digits is 1492992, while the sum is 50.

Adding to 28440461399 its sum of digits (50), we get a square (28440461449 = 168643²).

The spelling of 28440461399 in words is "twenty-eight billion, four hundred forty million, four hundred sixty-one thousand, three hundred ninety-nine".