23403534 has 64 divisors (see below), whose sum is σ = 58890240. Its totient is φ = 6023520.

The previous prime is 23403533. The next prime is 23403559. The reversal of 23403534 is 43530432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23403533) 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 31 ways as a sum of consecutive naturals, for example, 82557 + ... + 82839.

It is an arithmetic number, because the mean of its divisors is an integer number (920160).

Almost surely, 2^23403534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23403534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29445120).

23403534 is an abundant number, since it is smaller than the sum of its proper divisors (35486706).

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

23403534 is a wasteful number, since it uses less digits than its factorization.

23403534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 23403534 is about 4837.7199174818. The cubic root of 23403534 is about 286.0402489527.

Adding to 23403534 its reverse (43530432), we get a palindrome (66933966).

The spelling of 23403534 in words is "twenty-three million, four hundred three thousand, five hundred thirty-four".