23103990 has 216 divisors, whose sum is σ = 78107328. Its totient is φ = 4717440.

The previous prime is 23103973. The next prime is 23103991. The reversal of 23103990 is 9930132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103991) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 745275 + ... + 745305.

It is an arithmetic number, because the mean of its divisors is an integer number (361608).

Almost surely, 2^23103990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23103990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39053664).

23103990 is an abundant number, since it is smaller than the sum of its proper divisors (55003338).

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

23103990 is a wasteful number, since it uses less digits than its factorization.

23103990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 23103990 is about 4806.6610032329. The cubic root of 23103990 is about 284.8146532644.

The spelling of 23103990 in words is "twenty-three million, one hundred three thousand, nine hundred ninety".