8100720 has 60 divisors (see below), whose sum is σ = 27207336. Its totient is φ = 2160000.

The previous prime is 8100713. The next prime is 8100731. The reversal of 8100720 is 270018.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 8100693 and 8100702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4906 + ... + 6345.

Almost surely, 2^8100720 is an apocalyptic number.

8100720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8100720 is an abundant number, since it is smaller than the sum of its proper divisors (19106616).

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

8100720 is a wasteful number, since it uses less digits than its factorization.

8100720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270 (or 11261 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 8100720 is about 2846.1763824472. The cubic root of 8100720 is about 200.8358353635.

Adding to 8100720 its reverse (270018), we get a palindrome (8370738).

It can be divided in two parts, 8100 and 720, that multiplied together give a cube (5832000 = 180³).

The spelling of 8100720 in words is "eight million, one hundred thousand, seven hundred twenty".