1138557249 has 32 divisors (see below), whose sum is σ = 1739162880. Its totient is φ = 735696000.

The previous prime is 1138557241. The next prime is 1138557257. The reversal of 1138557249 is 9427558311.

1138557249 is a `hidden beast` number, since 1 + 1 + 38 + 5 + 572 + 49 = 666.

It is an interprime number because it is at equal distance from previous prime (1138557241) and next prime (1138557257).

It is not a de Polignac number, because 1138557249 - 2³ = 1138557241 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 11385 and 57249 contains 1138557249 itself.

It is not an unprimeable number, because it can be changed into a prime (1138557241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170524 + ... + 177074.

It is an arithmetic number, because the mean of its divisors is an integer number (54348840).

Almost surely, 2^1138557249 is an apocalyptic number.

It is an amenable number.

1138557249 is a deficient number, since it is larger than the sum of its proper divisors (600605631).

1138557249 is a wasteful number, since it uses less digits than its factorization.

1138557249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758 (or 6752 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1138557249 is about 33742.5139697682. The cubic root of 1138557249 is about 1044.2030504118.

It can be divided in two parts, 113855 and 7249, that added together give a square (121104 = 348²).

The spelling of 1138557249 in words is "one billion, one hundred thirty-eight million, five hundred fifty-seven thousand, two hundred forty-nine".