138493194 has 16 divisors (see below), whose sum is σ = 316555968. Its totient is φ = 39569472.

The previous prime is 138493193. The next prime is 138493207. The reversal of 138493194 is 491394831.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3297457 = 138493194 / (1 + 3 + 8 + 4 + 9 + 3 + 1 + 9 + 4).

It is not an unprimeable number, because it can be changed into a prime (138493193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648687 + ... + 1648770.

It is an arithmetic number, because the mean of its divisors is an integer number (19784748).

Almost surely, 2^138493194 is an apocalyptic number.

138493194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138493194 is an abundant number, since it is smaller than the sum of its proper divisors (178062774).

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

138493194 is a wasteful number, since it uses less digits than its factorization.

138493194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297469.

The product of its digits is 93312, while the sum is 42.

The square root of 138493194 is about 11768.3131331555. The cubic root of 138493194 is about 517.3798101238.

The spelling of 138493194 in words is "one hundred thirty-eight million, four hundred ninety-three thousand, one hundred ninety-four".