27890731469672 has 8 divisors (see below), whose sum is σ = 52295121505650. Its totient is φ = 13945365734832.

The previous prime is 27890731469651. The next prime is 27890731469687. The reversal of 27890731469672 is 27696413709872.

It can be written as a sum of positive squares in only one way, i.e., 23914192965796 + 3976538503876 = 4890214^2 + 1994126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 27890731469596 and 27890731469605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1743170716847 + ... + 1743170716862.

Almost surely, 2^{27890731469672} is an apocalyptic number.

It is an amenable number.

27890731469672 is a deficient number, since it is larger than the sum of its proper divisors (24404390035978).

27890731469672 is a wasteful number, since it uses less digits than its factorization.

27890731469672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486341433715 (or 3486341433711 counting only the distinct ones).

The product of its (nonzero) digits is 384072192, while the sum is 71.

The spelling of 27890731469672 in words is "twenty-seven trillion, eight hundred ninety billion, seven hundred thirty-one million, four hundred sixty-nine thousand, six hundred seventy-two".