1129881738 has 16 divisors (see below), whose sum is σ = 2332659456. Its totient is φ = 364477920.

The previous prime is 1129881737. The next prime is 1129881757. The reversal of 1129881738 is 8371889211.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1129881737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3037131 + ... + 3037502.

It is an arithmetic number, because the mean of its divisors is an integer number (145791216).

Almost surely, 2^1129881738 is an apocalyptic number.

1129881738 is an abundant number, since it is smaller than the sum of its proper divisors (1202777718).

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

1129881738 is a wasteful number, since it uses less digits than its factorization.

1129881738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074669.

The product of its digits is 193536, while the sum is 48.

The square root of 1129881738 is about 33613.7135407560. The cubic root of 1129881738 is about 1041.5440999369.

The spelling of 1129881738 in words is "one billion, one hundred twenty-nine million, eight hundred eighty-one thousand, seven hundred thirty-eight".