138543674 has 16 divisors (see below), whose sum is σ = 222143040. Its totient is φ = 64643040.

The previous prime is 138543667. The next prime is 138543679. The reversal of 138543674 is 476345831.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (138543679) 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, 34844 + ... + 38615.

It is an arithmetic number, because the mean of its divisors is an integer number (13883940).

Almost surely, 2^138543674 is an apocalyptic number.

138543674 is a deficient number, since it is larger than the sum of its proper divisors (83599366).

138543674 is a wasteful number, since it uses less digits than its factorization.

138543674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73525.

The product of its digits is 241920, while the sum is 41.

The square root of 138543674 is about 11770.4576801414. The cubic root of 138543674 is about 517.4426631770.

The spelling of 138543674 in words is "one hundred thirty-eight million, five hundred forty-three thousand, six hundred seventy-four".