8480781 has 10 divisors (see below), whose sum is σ = 12668942. Its totient is φ = 5653800.

The previous prime is 8480777. The next prime is 8480803. The reversal of 8480781 is 1870848.

8480781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 443556 = 2835^2 + 666^2 .

It is not a de Polignac number, because 8480781 - 2² = 8480777 is a prime.

It is a super-2 number, since 2×8480781² = 143847292739922, which contains 22 as substring.

It is a Duffinian number.

8480781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8480741) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 52270 + ... + 52431.

Almost surely, 2^8480781 is an apocalyptic number.

8480781 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8480781 is a deficient number, since it is larger than the sum of its proper divisors (4188161).

8480781 is a wasteful number, since it uses less digits than its factorization.

8480781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104713 (or 104704 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 8480781 is about 2912.1780508753. The cubic root of 8480781 is about 203.9288246509.

It can be divided in two parts, 8480 and 781, that added together give a cube (9261 = 21³).

The spelling of 8480781 in words is "eight million, four hundred eighty thousand, seven hundred eighty-one".