1145178890 has 16 divisors (see below), whose sum is σ = 2076370632. Its totient is φ = 454727424.

The previous prime is 1145178889. The next prime is 1145178899. The reversal of 1145178890 is 988715411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1002925561 + 142253329 = 31669^2 + 11927^2 .

It is a super-2 number, since 2×1145178890² = 2622869380203264200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145178899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416579 + ... + 419318.

Almost surely, 2^1145178890 is an apocalyptic number.

1145178890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1145178890 is a deficient number, since it is larger than the sum of its proper divisors (931191742).

1145178890 is a wasteful number, since it uses less digits than its factorization.

1145178890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836041.

The product of its (nonzero) digits is 80640, while the sum is 44.

The square root of 1145178890 is about 33840.4918699478. The cubic root of 1145178890 is about 1046.2234367981.

The spelling of 1145178890 in words is "one billion, one hundred forty-five million, one hundred seventy-eight thousand, eight hundred ninety".