1138678356 has 24 divisors (see below), whose sum is σ = 2718706144. Its totient is φ = 370732320.

The previous prime is 1138678337. The next prime is 1138678357. The reversal of 1138678356 is 6538768311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138678357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102855 + ... + 1103886.

Almost surely, 2^1138678356 is an apocalyptic number.

It is an amenable number.

1138678356 is an abundant number, since it is smaller than the sum of its proper divisors (1580027788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138678356 is a wasteful number, since it uses less digits than its factorization.

1138678356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206791 (or 2206789 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 1138678356 is about 33744.3084978786. The cubic root of 1138678356 is about 1044.2400726507.

The spelling of 1138678356 in words is "one billion, one hundred thirty-eight million, six hundred seventy-eight thousand, three hundred fifty-six".