23907720 has 64 divisors (see below), whose sum is σ = 72213120. Its totient is φ = 6331904.

The previous prime is 23907713. The next prime is 23907731. The reversal of 23907720 is 2770932.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19444 + ... + 20636.

It is an arithmetic number, because the mean of its divisors is an integer number (1128330).

Almost surely, 2^23907720 is an apocalyptic number.

23907720 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 23907720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36106560).

23907720 is an abundant number, since it is smaller than the sum of its proper divisors (48305400).

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

23907720 is a wasteful number, since it uses less digits than its factorization.

23907720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 23907720 is about 4889.5521267290. The cubic root of 23907720 is about 288.0797425790.

The spelling of 23907720 in words is "twenty-three million, nine hundred seven thousand, seven hundred twenty".