138440074 has 8 divisors (see below), whose sum is σ = 210288960. Its totient is φ = 68343756.

The previous prime is 138440063. The next prime is 138440077. The reversal of 138440074 is 470044831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138440077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437944 + ... + 438259.

It is an arithmetic number, because the mean of its divisors is an integer number (26286120).

Almost surely, 2^138440074 is an apocalyptic number.

138440074 is a deficient number, since it is larger than the sum of its proper divisors (71848886).

138440074 is an equidigital number, since it uses as much as digits as its factorization.

138440074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876284.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 138440074 is about 11766.0560087057. The cubic root of 138440074 is about 517.3136534913.

The spelling of 138440074 in words is "one hundred thirty-eight million, four hundred forty thousand, seventy-four".