23203140 has 24 divisors (see below), whose sum is σ = 64968960. Its totient is φ = 6187488.

The previous prime is 23203127. The next prime is 23203151. The reversal of 23203140 is 4130232.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 193300 + ... + 193419.

It is an arithmetic number, because the mean of its divisors is an integer number (2707040).

Almost surely, 2^23203140 is an apocalyptic number.

23203140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23203140 is an abundant number, since it is smaller than the sum of its proper divisors (41765820).

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

23203140 is a wasteful number, since it uses less digits than its factorization.

23203140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386731 (or 386729 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23203140 is about 4816.9637739971. The cubic root of 23203140 is about 285.2214960189.

Adding to 23203140 its reverse (4130232), we get a palindrome (27333372).

It can be divided in two parts, 2320 and 3140, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 23203140 in words is "twenty-three million, two hundred three thousand, one hundred forty".