1164778720 has 96 divisors (see below), whose sum is σ = 3156947136. Its totient is φ = 397824000.

The previous prime is 1164778709. The next prime is 1164778733. The reversal of 1164778720 is 278774611.

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, 312870 + ... + 316570.

It is an arithmetic number, because the mean of its divisors is an integer number (32884866).

Almost surely, 2^1164778720 is an apocalyptic number.

1164778720 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 1164778720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578473568).

1164778720 is an abundant number, since it is smaller than the sum of its proper divisors (1992168416).

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

1164778720 is a wasteful number, since it uses less digits than its factorization.

1164778720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 1164778720 is about 34128.8546540900. The cubic root of 1164778720 is about 1052.1584382611.

The spelling of 1164778720 in words is "one billion, one hundred sixty-four million, seven hundred seventy-eight thousand, seven hundred twenty".