23403642 has 16 divisors (see below), whose sum is σ = 46854720. Its totient is φ = 7793312.

The previous prime is 23403637. The next prime is 23403691. The reversal of 23403642 is 24630432.

It is a happy number.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10459 + ... + 12497.

It is an arithmetic number, because the mean of its divisors is an integer number (2928420).

Almost surely, 2^23403642 is an apocalyptic number.

23403642 is an abundant number, since it is smaller than the sum of its proper divisors (23451078).

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

23403642 is a wasteful number, since it uses less digits than its factorization.

23403642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 23403642 is about 4837.7310797522. The cubic root of 23403642 is about 286.0406889474.

It can be divided in two parts, 2340364 and 2, that added together give a triangular number (2340366 = T₂₁₆₃).

The spelling of 23403642 in words is "twenty-three million, four hundred three thousand, six hundred forty-two".