1163978240 has 40 divisors (see below), whose sum is σ = 2790825840. Its totient is φ = 465590272.

The previous prime is 1163978197. The next prime is 1163978267. The reversal of 1163978240 is 428793611.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224780 + ... + 229899.

It is an arithmetic number, because the mean of its divisors is an integer number (69770646).

Almost surely, 2^1163978240 is an apocalyptic number.

1163978240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163978240 is an abundant number, since it is smaller than the sum of its proper divisors (1626847600).

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

1163978240 is an frugal number, since it uses more digits than its factorization.

1163978240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454702 (or 454686 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1163978240 is about 34117.1253185259. The cubic root of 1163978240 is about 1051.9173553316.

The spelling of 1163978240 in words is "one billion, one hundred sixty-three million, nine hundred seventy-eight thousand, two hundred forty".