1145911808 has 20 divisors (see below), whose sum is σ = 2289586530. Its totient is φ = 572955648.

The previous prime is 1145911801. The next prime is 1145911817. The reversal of 1145911808 is 8081195411.

It can be written as a sum of positive squares in only one way, i.e., 1142980864 + 2930944 = 33808^2 + 1712^2 .

It is a super-2 number, since 2×1145911808² = 2626227743427657728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145911801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1118543 + ... + 1119566.

Almost surely, 2^1145911808 is an apocalyptic number.

It is an amenable number.

1145911808 is a deficient number, since it is larger than the sum of its proper divisors (1143674722).

1145911808 is an frugal number, since it uses more digits than its factorization.

1145911808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238127 (or 2238111 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 38.

The square root of 1145911808 is about 33851.3191471174. The cubic root of 1145911808 is about 1046.4465846020.

The spelling of 1145911808 in words is "one billion, one hundred forty-five million, nine hundred eleven thousand, eight hundred eight".