27728572454 has 32 divisors (see below), whose sum is σ = 46270621440. Its totient is φ = 12356831200.

The previous prime is 27728572447. The next prime is 27728572471. The reversal of 27728572454 is 45427582772.

It is a junction number, because it is equal to n+sod(n) for n = 27728572396 and 27728572405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230012 + ... + 329184.

It is an arithmetic number, because the mean of its divisors is an integer number (1445956920).

Almost surely, 2^27728572454 is an apocalyptic number.

27728572454 is a deficient number, since it is larger than the sum of its proper divisors (18542048986).

27728572454 is a wasteful number, since it uses less digits than its factorization.

27728572454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99436.

The product of its digits is 8780800, while the sum is 53.

The spelling of 27728572454 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, four hundred fifty-four".