1138901694 has 32 divisors (see below), whose sum is σ = 2628487680. Its totient is φ = 322240032.

The previous prime is 1138901693. The next prime is 1138901713. The reversal of 1138901694 is 4961098311.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138901693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127309 + ... + 135960.

It is an arithmetic number, because the mean of its divisors is an integer number (82140240).

Almost surely, 2^1138901694 is an apocalyptic number.

1138901694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1138901694 is an abundant number, since it is smaller than the sum of its proper divisors (1489585986).

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

1138901694 is a wasteful number, since it uses less digits than its factorization.

1138901694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263384.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1138901694 is about 33747.6176048029. The cubic root of 1138901694 is about 1044.3083398782.

The spelling of 1138901694 in words is "one billion, one hundred thirty-eight million, nine hundred one thousand, six hundred ninety-four".