1023400144 has 20 divisors (see below), whose sum is σ = 2135364196. Its totient is φ = 472338432.

The previous prime is 1023400127. The next prime is 1023400159. The reversal of 1023400144 is 4410043201.

It can be written as a sum of positive squares in 2 ways, for example, as 91929744 + 931470400 = 9588^2 + 30520^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2459889 + ... + 2460304.

Almost surely, 2^1023400144 is an apocalyptic number.

It is an amenable number.

1023400144 is an abundant number, since it is smaller than the sum of its proper divisors (1111964052).

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

1023400144 is a wasteful number, since it uses less digits than its factorization.

1023400144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920214 (or 4920208 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1023400144 is about 31990.6258769659. The cubic root of 1023400144 is about 1007.7399860551.

Adding to 1023400144 its reverse (4410043201), we get a palindrome (5433443345).

The spelling of 1023400144 in words is "one billion, twenty-three million, four hundred thousand, one hundred forty-four".