138170040 has 32 divisors (see below), whose sum is σ = 414510480. Its totient is φ = 36845312.

The previous prime is 138170027. The next prime is 138170057. The reversal of 138170040 is 40071831.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575589 + ... + 575828.

Almost surely, 2^138170040 is an apocalyptic number.

138170040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138170040 is an abundant number, since it is smaller than the sum of its proper divisors (276340440).

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

138170040 is a wasteful number, since it uses less digits than its factorization.

138170040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151431 (or 1151427 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 138170040 is about 11754.5752794391. The cubic root of 138170040 is about 516.9770862072.

The spelling of 138170040 in words is "one hundred thirty-eight million, one hundred seventy thousand, forty".