23728555 has 8 divisors (see below), whose sum is σ = 28875744. Its totient is φ = 18715200.

The previous prime is 23728541. The next prime is 23728567. The reversal of 23728555 is 55582732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-23728555 is a prime.

It is a Duffinian 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, 33066 + ... + 33775.

It is an arithmetic number, because the mean of its divisors is an integer number (3609468).

Almost surely, 2^23728555 is an apocalyptic number.

23728555 is a deficient number, since it is larger than the sum of its proper divisors (5147189).

23728555 is an equidigital number, since it uses as much as digits as its factorization.

23728555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66917.

The product of its digits is 84000, while the sum is 37.

The square root of 23728555 is about 4871.1964649355. The cubic root of 23728555 is about 287.3583120363.

The spelling of 23728555 in words is "twenty-three million, seven hundred twenty-eight thousand, five hundred fifty-five".