23416640 has 84 divisors (see below), whose sum is σ = 60519564. Its totient is φ = 8626176.

The previous prime is 23416637. The next prime is 23416649. The reversal of 23416640 is 4661432.

It can be written as a sum of positive squares in 6 ways, for example, as 9339136 + 14077504 = 3056^2 + 3752^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23416649) 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 11 ways as a sum of consecutive naturals, for example, 53864 + ... + 54296.

It is an arithmetic number, because the mean of its divisors is an integer number (720471).

Almost surely, 2^23416640 is an apocalyptic number.

23416640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23416640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30259782).

23416640 is an abundant number, since it is smaller than the sum of its proper divisors (37102924).

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

23416640 is a wasteful number, since it uses less digits than its factorization.

23416640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 23416640 is about 4839.0742916388. The cubic root of 23416640 is about 286.0936332540.

The spelling of 23416640 in words is "twenty-three million, four hundred sixteen thousand, six hundred forty".