28408183661 has 16 divisors (see below), whose sum is σ = 33385144128. Its totient is φ = 23831539200.

The previous prime is 28408183613. The next prime is 28408183679. The reversal of 28408183661 is 16638180482.

It is a cyclic number.

It is not a de Polignac number, because 28408183661 - 2⁶ = 28408183597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408183561) 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, 451070 + ... + 510176.

It is an arithmetic number, because the mean of its divisors is an integer number (2086571508).

Almost surely, 2^28408183661 is an apocalyptic number.

It is an amenable number.

28408183661 is a deficient number, since it is larger than the sum of its proper divisors (4976960467).

28408183661 is a wasteful number, since it uses less digits than its factorization.

28408183661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62492.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 28408183661 in words is "twenty-eight billion, four hundred eight million, one hundred eighty-three thousand, six hundred sixty-one".