23190856 has 48 divisors (see below), whose sum is σ = 49904100. Its totient is φ = 10063872.

The previous prime is 23190847. The next prime is 23190901. The reversal of 23190856 is 65809132.

It can be written as a sum of positive squares in 6 ways, for example, as 4268356 + 18922500 = 2066^2 + 4350^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 22480 + ... + 23488.

Almost surely, 2^23190856 is an apocalyptic number.

23190856 is a gapful number since it is divisible by the number (26) 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 23190856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24952050).

23190856 is an abundant number, since it is smaller than the sum of its proper divisors (26713244).

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

23190856 is a wasteful number, since it uses less digits than its factorization.

23190856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 23190856 is about 4815.6885281339. The cubic root of 23190856 is about 285.1711539915.

Adding to 23190856 its reverse (65809132), we get a palindrome (88999988).

The spelling of 23190856 in words is "twenty-three million, one hundred ninety thousand, eight hundred fifty-six".