140388138 has 48 divisors (see below), whose sum is σ = 340812576. Its totient is φ = 41389920.

The previous prime is 140388137. The next prime is 140388167. The reversal of 140388138 is 831883041.

140388138 is a `hidden beast` number, since 140 + 388 + 138 = 666.

It is a super-2 number, since 2×140388138² = 39417658582214088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140388133) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2256 + ... + 16907.

It is an arithmetic number, because the mean of its divisors is an integer number (7100262).

Almost surely, 2^140388138 is an apocalyptic number.

140388138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

140388138 is an abundant number, since it is smaller than the sum of its proper divisors (200424438).

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

140388138 is a wasteful number, since it uses less digits than its factorization.

140388138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19219 (or 19216 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 140388138 is about 11848.5500378738. The cubic root of 140388138 is about 519.7288255725.

The spelling of 140388138 in words is "one hundred forty million, three hundred eighty-eight thousand, one hundred thirty-eight".