1145273840 has 80 divisors (see below), whose sum is σ = 2713138848. Its totient is φ = 449522688.

The previous prime is 1145273837. The next prime is 1145273851. The reversal of 1145273840 is 483725411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1145273840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148222 + ... + 1149218.

Almost surely, 2^1145273840 is an apocalyptic number.

1145273840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145273840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356569424).

1145273840 is an abundant number, since it is smaller than the sum of its proper divisors (1567865008).

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

1145273840 is a wasteful number, since it uses less digits than its factorization.

1145273840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1145273840 is about 33841.8947460097. The cubic root of 1145273840 is about 1046.2523511074.

The spelling of 1145273840 in words is "one billion, one hundred forty-five million, two hundred seventy-three thousand, eight hundred forty".