28461401109 has 16 divisors (see below), whose sum is σ = 43304635840. Its totient is φ = 18461448720.

The previous prime is 28461401099. The next prime is 28461401123. The reversal of 28461401109 is 90110416482.

28461401109 is a `hidden beast` number, since 28 + 4 + 614 + 0 + 1 + 10 + 9 = 666.

It is not a de Polignac number, because 28461401109 - 2¹¹ = 28461399061 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 (28461401209) 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, 14243947 + ... + 14245944.

It is an arithmetic number, because the mean of its divisors is an integer number (2706539740).

Almost surely, 2^28461401109 is an apocalyptic number.

It is an amenable number.

28461401109 is a deficient number, since it is larger than the sum of its proper divisors (14843234731).

28461401109 is a wasteful number, since it uses less digits than its factorization.

28461401109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28489937 (or 28489931 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 28461401109 in words is "twenty-eight billion, four hundred sixty-one million, four hundred one thousand, one hundred nine".