1152171378 has 28 divisors (see below), whose sum is σ = 2591203518. Its totient is φ = 384056640.

The previous prime is 1152171367. The next prime is 1152171403. The reversal of 1152171378 is 8731712511.

1152171378 is a `hidden beast` number, since 115 + 2 + 171 + 378 = 666.

1152171378 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1122719049 + 29452329 = 33507^2 + 5427^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 393663 + ... + 396578.

Almost surely, 2^1152171378 is an apocalyptic number.

1152171378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1152171378 is an abundant number, since it is smaller than the sum of its proper divisors (1439032140).

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

1152171378 is an frugal number, since it uses more digits than its factorization.

1152171378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790261 (or 790246 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 1152171378 is about 33943.6500394404. The cubic root of 1152171378 is about 1048.3485386035.

Adding to 1152171378 its reverse (8731712511), we get a palindrome (9883883889).

The spelling of 1152171378 in words is "one billion, one hundred fifty-two million, one hundred seventy-one thousand, three hundred seventy-eight".