1138899758 has 4 divisors (see below), whose sum is σ = 1708349640. Its totient is φ = 569449878.

The previous prime is 1138899757. The next prime is 1138899779. The reversal of 1138899758 is 8579988311.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1138899697 and 1138899706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138899757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284724938 + ... + 284724941.

It is an arithmetic number, because the mean of its divisors is an integer number (427087410).

Almost surely, 2^1138899758 is an apocalyptic number.

1138899758 is a deficient number, since it is larger than the sum of its proper divisors (569449882).

1138899758 is an equidigital number, since it uses as much as digits as its factorization.

1138899758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569449881.

The product of its digits is 4354560, while the sum is 59.

The square root of 1138899758 is about 33747.5889212844. The cubic root of 1138899758 is about 1044.3077481438.

The spelling of 1138899758 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, seven hundred fifty-eight".