23140402 has 8 divisors (see below), whose sum is σ = 34796700. Its totient is φ = 11541504.

The previous prime is 23140399. The next prime is 23140409. The reversal of 23140402 is 20404132.

It can be written as a sum of positive squares in 2 ways, for example, as 17480761 + 5659641 = 4181^2 + 2379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (23140409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13327 + ... + 14962.

Almost surely, 2^23140402 is an apocalyptic number.

23140402 is a deficient number, since it is larger than the sum of its proper divisors (11656298).

23140402 is a wasteful number, since it uses less digits than its factorization.

23140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28700.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 23140402 is about 4810.4471725610. The cubic root of 23140402 is about 284.9641978213.

Adding to 23140402 its reverse (20404132), we get a palindrome (43544534).

The spelling of 23140402 in words is "twenty-three million, one hundred forty thousand, four hundred two".