23780002 has 4 divisors (see below), whose sum is σ = 35670006. Its totient is φ = 11890000.

The previous prime is 23779997. The next prime is 23780017. The reversal of 23780002 is 20008732.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 23726641 + 53361 = 4871^2 + 231^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 5944999 + ... + 5945002.

Almost surely, 2^23780002 is an apocalyptic number.

23780002 is a deficient number, since it is larger than the sum of its proper divisors (11890004).

23780002 is a wasteful number, since it uses less digits than its factorization.

23780002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11890003.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 23780002 is about 4876.4743411608. The cubic root of 23780002 is about 287.5658404972.

Adding to 23780002 its reverse (20008732), we get a palindrome (43788734).

The spelling of 23780002 in words is "twenty-three million, seven hundred eighty thousand, two".