1178542872 has 160 divisors (see below), whose sum is σ = 3670423680. Its totient is φ = 350853120.

The previous prime is 1178542853. The next prime is 1178542873. The reversal of 1178542872 is 2782458711.

It is a super-2 number, since 2×1178542872² = 2777926602284016768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178542873) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 258888 + ... + 263400.

It is an arithmetic number, because the mean of its divisors is an integer number (22940148).

Almost surely, 2^1178542872 is an apocalyptic number.

1178542872 is a gapful number since it is divisible by the number (12) 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 1178542872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835211840).

1178542872 is an abundant number, since it is smaller than the sum of its proper divisors (2491880808).

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

1178542872 is a wasteful number, since it uses less digits than its factorization.

1178542872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575 (or 4562 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 1178542872 is about 34329.9122049562. The cubic root of 1178542872 is about 1056.2866602964.

The spelling of 1178542872 in words is "one billion, one hundred seventy-eight million, five hundred forty-two thousand, eight hundred seventy-two".