8781272 has 8 divisors (see below), whose sum is σ = 16464900. Its totient is φ = 4390632.

The previous prime is 8781271. The next prime is 8781293. The reversal of 8781272 is 2721878.

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

It is a super-2 number, since 2×8781272² = 154221475875968, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8781271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548822 + ... + 548837.

Almost surely, 2^8781272 is an apocalyptic number.

It is an amenable number.

8781272 is a deficient number, since it is larger than the sum of its proper divisors (7683628).

8781272 is a wasteful number, since it uses less digits than its factorization.

8781272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097665 (or 1097661 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 8781272 is about 2963.3211098361. The cubic root of 8781272 is about 206.3094604198.

The spelling of 8781272 in words is "eight million, seven hundred eighty-one thousand, two hundred seventy-two".