23235440 has 20 divisors (see below), whose sum is σ = 54022584. Its totient is φ = 9294144.

The previous prime is 23235431. The next prime is 23235469. The reversal of 23235440 is 4453232.

It is a tau number, because it is divible by the number of its divisors (20).

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, 145142 + ... + 145301.

Almost surely, 2^23235440 is an apocalyptic number.

23235440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23235440 is an abundant number, since it is smaller than the sum of its proper divisors (30787144).

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

23235440 is a wasteful number, since it uses less digits than its factorization.

23235440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290456 (or 290450 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 23235440 is about 4820.3153423817. The cubic root of 23235440 is about 285.3537824651.

Adding to 23235440 its reverse (4453232), we get a palindrome (27688672).

The spelling of 23235440 in words is "twenty-three million, two hundred thirty-five thousand, four hundred forty".