1145000400 has 60 divisors (see below), whose sum is σ = 3667821792. Its totient is φ = 305333120.

The previous prime is 1145000357. The next prime is 1145000447. The reversal of 1145000400 is 40005411.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×1145000400² = 2622051832000320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1145000400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475884 + ... + 478283.

Almost surely, 2^1145000400 is an apocalyptic number.

1145000400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145000400 is an abundant number, since it is smaller than the sum of its proper divisors (2522821392).

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

1145000400 is a wasteful number, since it uses less digits than its factorization.

1145000400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954188 (or 954177 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1145000400 is about 33837.8545419180. The cubic root of 1145000400 is about 1046.1690784425.

Adding to 1145000400 its reverse (40005411), we get a palindrome (1185005811).

The spelling of 1145000400 in words is "one billion, one hundred forty-five million, four hundred", and thus it is an aban number.