23120720 has 160 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 7188480.

The previous prime is 23120711. The next prime is 23120737. The reversal of 23120720 is 2702132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436214 + ... + 436266.

It is an arithmetic number, because the mean of its divisors is an integer number (421848).

Almost surely, 2^23120720 is an apocalyptic number.

23120720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23120720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

23120720 is an abundant number, since it is smaller than the sum of its proper divisors (44374960).

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

23120720 is a wasteful number, since it uses less digits than its factorization.

23120720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 23120720 is about 4808.4009816154. The cubic root of 23120720 is about 284.8833830882.

Adding to 23120720 its reverse (2702132), we get a palindrome (25822852).

It can be divided in two parts, 23120 and 720, that multiplied together give a square (16646400 = 4080²).

The spelling of 23120720 in words is "twenty-three million, one hundred twenty thousand, seven hundred twenty".