1145644000 has 48 divisors (see below), whose sum is σ = 2814857136. Its totient is φ = 458256000.

The previous prime is 1145643997. The next prime is 1145644009. The reversal of 1145644000 is 4465411.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145644009) 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 7 ways as a sum of consecutive naturals, for example, 139206 + ... + 147205.

It is an arithmetic number, because the mean of its divisors is an integer number (58642857).

Almost surely, 2^1145644000 is an apocalyptic number.

1145644000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145644000 is an abundant number, since it is smaller than the sum of its proper divisors (1669213136).

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

1145644000 is an equidigital number, since it uses as much as digits as its factorization.

1145644000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286436 (or 286418 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1145644000 is about 33847.3632651053. The cubic root of 1145644000 is about 1046.3650575014.

The spelling of 1145644000 in words is "one billion, one hundred forty-five million, six hundred forty-four thousand".