23209780 has 24 divisors (see below), whose sum is σ = 53172000. Its totient is φ = 8439840.

The previous prime is 23209759. The next prime is 23209787. The reversal of 23209780 is 8790232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52530 + ... + 52969.

It is an arithmetic number, because the mean of its divisors is an integer number (2215500).

Almost surely, 2^23209780 is an apocalyptic number.

23209780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23209780 is an abundant number, since it is smaller than the sum of its proper divisors (29962220).

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

23209780 is a wasteful number, since it uses less digits than its factorization.

23209780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105519 (or 105517 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 23209780 is about 4817.6529555376. The cubic root of 23209780 is about 285.2487005282.

It can be divided in two parts, 2320 and 9780, that added together give a square (12100 = 110²).

The spelling of 23209780 in words is "twenty-three million, two hundred nine thousand, seven hundred eighty".