8132720 has 40 divisors (see below), whose sum is σ = 19028544. Its totient is φ = 3232512.

The previous prime is 8132713. The next prime is 8132743. The reversal of 8132720 is 272318.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×8132720² = 132282269196800, which contains 22 as substring.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21977 + ... + 22343.

Almost surely, 2^8132720 is an apocalyptic number.

8132720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8132720 is an abundant number, since it is smaller than the sum of its proper divisors (10895824).

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

8132720 is a wasteful number, since it uses less digits than its factorization.

8132720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 8132720 is about 2851.7924188131. The cubic root of 8132720 is about 201.0999395748.

The spelling of 8132720 in words is "eight million, one hundred thirty-two thousand, seven hundred twenty".