1145402720 has 192 divisors, whose sum is σ = 3396556800. Its totient is φ = 354600960.

The previous prime is 1145402711. The next prime is 1145402723. The reversal of 1145402720 is 272045411.

It is a self number, because there is not a number n which added to its sum of digits gives 1145402720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145402723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2944286 + ... + 2944674.

It is an arithmetic number, because the mean of its divisors is an integer number (17690400).

Almost surely, 2^1145402720 is an apocalyptic number.

1145402720 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 1145402720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698278400).

1145402720 is an abundant number, since it is smaller than the sum of its proper divisors (2251154080).

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

1145402720 is a wasteful number, since it uses less digits than its factorization.

1145402720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1145402720 is about 33843.7988411467. The cubic root of 1145402720 is about 1046.2915952720.

The spelling of 1145402720 in words is "one billion, one hundred forty-five million, four hundred two thousand, seven hundred twenty".