23015780 has 24 divisors (see below), whose sum is σ = 49247352. Its totient is φ = 9032192.

The previous prime is 23015777. The next prime is 23015789. The reversal of 23015780 is 8751032.

It can be written as a sum of positive squares in 4 ways, for example, as 2149156 + 20866624 = 1466^2 + 4568^2 .

It is a super-2 number, since 2×23015780² = 1059452258016800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23015789) 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 7 ways as a sum of consecutive naturals, for example, 9797 + ... + 11916.

It is an arithmetic number, because the mean of its divisors is an integer number (2051973).

Almost surely, 2^23015780 is an apocalyptic number.

23015780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23015780 is an abundant number, since it is smaller than the sum of its proper divisors (26231572).

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

23015780 is a wasteful number, since it uses less digits than its factorization.

23015780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21775 (or 21773 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 23015780 is about 4797.4764199525. The cubic root of 23015780 is about 284.4517211183.

The spelling of 23015780 in words is "twenty-three million, fifteen thousand, seven hundred eighty".