1172378256 has 80 divisors (see below), whose sum is σ = 3474729984. Its totient is φ = 333666432.

The previous prime is 1172378213. The next prime is 1172378257. The reversal of 1172378256 is 6528732711.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (1172378257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81735 + ... + 95001.

Almost surely, 2^1172378256 is an apocalyptic number.

1172378256 is a gapful number since it is divisible by the number (16) 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 1172378256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737364992).

1172378256 is an abundant number, since it is smaller than the sum of its proper divisors (2302351728).

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

1172378256 is a wasteful number, since it uses less digits than its factorization.

1172378256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13548 (or 13542 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 1172378256 is about 34240.0095794379. The cubic root of 1172378256 is about 1054.4417300460.

The spelling of 1172378256 in words is "one billion, one hundred seventy-two million, three hundred seventy-eight thousand, two hundred fifty-six".