28165566276 has 81 divisors (see below), whose sum is σ = 72278889501. Its totient is φ = 9247883904.

The previous prime is 28165566263. The next prime is 28165566337. The reversal of 28165566276 is 67266556182.

The square root of 28165566276 is 167826.

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

28165566276 is a `hidden beast` number, since 2 + 8 + 1 + 6 + 5 + 5 + 6 + 627 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7595122500 + 20570443776 = 87150^2 + 143424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 83577180 + ... + 83577516.

Almost surely, 2^28165566276 is an apocalyptic number.

28165566276 is the 167826-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28165566276

28165566276 is an abundant number, since it is smaller than the sum of its proper divisors (44113323225).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28165566276 is an equidigital number, since it uses as much as digits as its factorization.

28165566276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 425 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

It can be divided in two parts, 28165 and 566276, that added together give a square (594441 = 771²).

The spelling of 28165566276 in words is "twenty-eight billion, one hundred sixty-five million, five hundred sixty-six thousand, two hundred seventy-six".