1144619858 has 18 divisors (see below), whose sum is σ = 1757690661. Its totient is φ = 559032664.

The previous prime is 1144619857. The next prime is 1144619873. The reversal of 1144619858 is 8589164411.

It can be written as a sum of positive squares in 2 ways, for example, as 1018439569 + 126180289 = 31913^2 + 11233^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23923.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1144619857) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2248508 + ... + 2249016.

Almost surely, 2^1144619858 is an apocalyptic number.

1144619858 is a deficient number, since it is larger than the sum of its proper divisors (613070803).

1144619858 is an frugal number, since it uses more digits than its factorization.

1144619858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 558 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 1144619858 is about 33832.2310526516. The cubic root of 1144619858 is about 1046.0531671625.

The spelling of 1144619858 in words is "one billion, one hundred forty-four million, six hundred nineteen thousand, eight hundred fifty-eight".