1172285640 has 96 divisors (see below), whose sum is σ = 3822698880. Its totient is φ = 311561856.

The previous prime is 1172285633. The next prime is 1172285669. The reversal of 1172285640 is 465822711.

1172285640 is a `hidden beast` number, since 1 + 1 + 7 + 2 + 2 + 8 + 5 + 640 = 666.

1172285640 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1172285595 and 1172285604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105217 + ... + 115823.

It is an arithmetic number, because the mean of its divisors is an integer number (39819780).

Almost surely, 2^1172285640 is an apocalyptic number.

1172285640 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 1172285640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911349440).

1172285640 is an abundant number, since it is smaller than the sum of its proper divisors (2650413240).

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

1172285640 is a wasteful number, since it uses less digits than its factorization.

1172285640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10931 (or 10924 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1172285640 is about 34238.6570998338. The cubic root of 1172285640 is about 1054.4139629135.

The spelling of 1172285640 in words is "one billion, one hundred seventy-two million, two hundred eighty-five thousand, six hundred forty".