23433640 has 16 divisors (see below), whose sum is σ = 52725780. Its totient is φ = 9373440.

The previous prime is 23433637. The next prime is 23433647. The reversal of 23433640 is 4633432.

It can be written as a sum of positive squares in 2 ways, for example, as 22297284 + 1136356 = 4722^2 + 1066^2 .

It is not an unprimeable number, because it can be changed into a prime (23433647) 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 3 ways as a sum of consecutive naturals, for example, 292881 + ... + 292960.

Almost surely, 2^23433640 is an apocalyptic number.

23433640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23433640 is an abundant number, since it is smaller than the sum of its proper divisors (29292140).

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

23433640 is a wasteful number, since it uses less digits than its factorization.

23433640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585852 (or 585848 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 23433640 is about 4840.8305072580. The cubic root of 23433640 is about 286.1628492088.

The spelling of 23433640 in words is "twenty-three million, four hundred thirty-three thousand, six hundred forty".