23770890 has 96 divisors (see below), whose sum is σ = 72648576. Its totient is φ = 5316480.

The previous prime is 23770889. The next prime is 23770897. The reversal of 23770890 is 9807732.

It is a super-2 number, since 2×23770890² = 1130110422784200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23770897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11947 + ... + 13793.

It is an arithmetic number, because the mean of its divisors is an integer number (756756).

Almost surely, 2^23770890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23770890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36324288).

23770890 is an abundant number, since it is smaller than the sum of its proper divisors (48877686).

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

23770890 is a wasteful number, since it uses less digits than its factorization.

23770890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 23770890 is about 4875.5399700956. The cubic root of 23770890 is about 287.5291060640.

The spelling of 23770890 in words is "twenty-three million, seven hundred seventy thousand, eight hundred ninety".