23002405 has 4 divisors (see below), whose sum is σ = 27602892. Its totient is φ = 18401920.

The previous prime is 23002391. The next prime is 23002417. The reversal of 23002405 is 50420032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9941409 + 13060996 = 3153^2 + 3614^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23002405 is a prime.

It is a super-2 number, since 2×23002405² = 1058221271568050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300236 + ... + 2300245.

It is an arithmetic number, because the mean of its divisors is an integer number (6900723).

Almost surely, 2^23002405 is an apocalyptic number.

It is an amenable number.

23002405 is a deficient number, since it is larger than the sum of its proper divisors (4600487).

23002405 is an equidigital number, since it uses as much as digits as its factorization.

23002405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600486.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 23002405 is about 4796.0822553413. The cubic root of 23002405 is about 284.3966099586.

Adding to 23002405 its reverse (50420032), we get a palindrome (73422437).

The spelling of 23002405 in words is "twenty-three million, two thousand, four hundred five".