28006047221476 has 27 divisors (see below), whose sum is σ = 49073286484411. Its totient is φ = 13985131108544.

The previous prime is 28006047221461. The next prime is 28006047221489. The reversal of 28006047221476 is 67412274060082.

The square root of 28006047221476 is 5292074.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 719799528100 + 27286247693376 = 848410^2 + 5223624^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13007916816 + ... + 13007918968.

Almost surely, 2^{28006047221476} is an apocalyptic number.

28006047221476 is the 5292074-th square number.

It is an amenable number.

28006047221476 is a deficient number, since it is larger than the sum of its proper divisors (21067239262935).

28006047221476 is an frugal number, since it uses more digits than its factorization.

28006047221476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768 (or 3384 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 49.

The spelling of 28006047221476 in words is "twenty-eight trillion, six billion, forty-seven million, two hundred twenty-one thousand, four hundred seventy-six".