1155678720 has 480 divisors, whose sum is σ = 4467089088. Its totient is φ = 253919232.

The previous prime is 1155678709. The next prime is 1155678737. The reversal of 1155678720 is 278765511.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13923799 + ... + 13923881.

Almost surely, 2^1155678720 is an apocalyptic number.

1155678720 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 1155678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2233544544).

1155678720 is an abundant number, since it is smaller than the sum of its proper divisors (3311410368).

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

1155678720 is an equidigital number, since it uses as much as digits as its factorization.

1155678720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 42.

The square root of 1155678720 is about 33995.2749657949. The cubic root of 1155678720 is about 1049.4112254692.

The spelling of 1155678720 in words is "one billion, one hundred fifty-five million, six hundred seventy-eight thousand, seven hundred twenty".