23402142 has 16 divisors (see below), whose sum is σ = 52004880. Its totient is φ = 7800696.

The previous prime is 23402107. The next prime is 23402143. The reversal of 23402142 is 24120432.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402143) by changing a digit.

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, 216633 + ... + 216740.

It is an arithmetic number, because the mean of its divisors is an integer number (3250305).

Almost surely, 2^23402142 is an apocalyptic number.

23402142 is an abundant number, since it is smaller than the sum of its proper divisors (28602738).

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

23402142 is a wasteful number, since it uses less digits than its factorization.

23402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433384 (or 433378 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 23402142 is about 4837.5760459139. The cubic root of 23402142 is about 286.0345777875.

Adding to 23402142 its reverse (24120432), we get a palindrome (47522574).

The spelling of 23402142 in words is "twenty-three million, four hundred two thousand, one hundred forty-two".