1024400645 has 8 divisors (see below), whose sum is σ = 1229530104. Its totient is φ = 819354304.

The previous prime is 1024400627. The next prime is 1024400647. The reversal of 1024400645 is 5460044201.

1024400645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 65011969 + 959388676 = 8063^2 + 30974^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1024400645 - 2²⁶ = 957291781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024400647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10667 + ... + 46503.

It is an arithmetic number, because the mean of its divisors is an integer number (153691263).

Almost surely, 2^1024400645 is an apocalyptic number.

It is an amenable number.

1024400645 is a deficient number, since it is larger than the sum of its proper divisors (205129459).

1024400645 is an equidigital number, since it uses as much as digits as its factorization.

1024400645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41559.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1024400645 is about 32006.2594659232. The cubic root of 1024400645 is about 1008.0682761791.

Adding to 1024400645 its reverse (5460044201), we get a palindrome (6484444846).

The spelling of 1024400645 in words is "one billion, twenty-four million, four hundred thousand, six hundred forty-five".