23478740 has 12 divisors (see below), whose sum is σ = 49305396. Its totient is φ = 9391488.

The previous prime is 23478739. The next prime is 23478761. The reversal of 23478740 is 4787432.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 7828804 = 3956^2 + 2798^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23478740.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 586949 + ... + 586988.

It is an arithmetic number, because the mean of its divisors is an integer number (4108783).

Almost surely, 2^23478740 is an apocalyptic number.

23478740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23478740 is an abundant number, since it is smaller than the sum of its proper divisors (25826656).

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

23478740 is a wasteful number, since it uses less digits than its factorization.

23478740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173946 (or 1173944 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 23478740 is about 4845.4865596759. The cubic root of 23478740 is about 286.3463130072.

The spelling of 23478740 in words is "twenty-three million, four hundred seventy-eight thousand, seven hundred forty".