202638423 has 8 divisors (see below), whose sum is σ = 290968048. Its totient is φ = 124700544.

The previous prime is 202638409. The next prime is 202638427. The reversal of 202638423 is 324836202.

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

It is not a de Polignac number, because 202638423 - 2⁴ = 202638407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202638427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597890 + ... + 2597967.

It is an arithmetic number, because the mean of its divisors is an integer number (36371006).

Almost surely, 2^202638423 is an apocalyptic number.

202638423 is a deficient number, since it is larger than the sum of its proper divisors (88329625).

202638423 is a wasteful number, since it uses less digits than its factorization.

202638423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195873.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 202638423 is about 14235.1123283239. The cubic root of 202638423 is about 587.3639200748.

The spelling of 202638423 in words is "two hundred two million, six hundred thirty-eight thousand, four hundred twenty-three".