1023440004 has 36 divisors (see below), whose sum is σ = 2590247296. Its totient is φ = 340722288.

The previous prime is 1023440003. The next prime is 1023440009. The reversal of 1023440004 is 4000443201.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1023440003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12357 + ... + 46899.

Almost surely, 2^1023440004 is an apocalyptic number.

It is an amenable number.

1023440004 is an abundant number, since it is smaller than the sum of its proper divisors (1566807292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023440004 is a wasteful number, since it uses less digits than its factorization.

1023440004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35376 (or 35371 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1023440004 is about 31991.2488659008. The cubic root of 1023440004 is about 1007.7530692382.

Adding to 1023440004 its reverse (4000443201), we get a palindrome (5023883205).

The spelling of 1023440004 in words is "one billion, twenty-three million, four hundred forty thousand, four".