1023404002 has 4 divisors (see below), whose sum is σ = 1535106006. Its totient is φ = 511702000.

The previous prime is 1023403987. The next prime is 1023404003. The reversal of 1023404002 is 2004043201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2004043201 = 277 ⋅7234813.

It can be written as a sum of positive squares in only one way, i.e., 955489921 + 67914081 = 30911^2 + 8241^2 .

It is not an unprimeable number, because it can be changed into a prime (1023404003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255850999 + ... + 255851002.

Almost surely, 2^1023404002 is an apocalyptic number.

1023404002 is a deficient number, since it is larger than the sum of its proper divisors (511702004).

1023404002 is an equidigital number, since it uses as much as digits as its factorization.

1023404002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511702003.

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

The square root of 1023404002 is about 31990.6861758231. The cubic root of 1023404002 is about 1007.7412523750.

Adding to 1023404002 its reverse (2004043201), we get a palindrome (3027447203).

The spelling of 1023404002 in words is "one billion, twenty-three million, four hundred four thousand, two".