240156138 has 32 divisors (see below), whose sum is σ = 487226880. Its totient is φ = 78908400.

The previous prime is 240156131. The next prime is 240156157. The reversal of 240156138 is 831651042.

It is not an unprimeable number, because it can be changed into a prime (240156131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124981 + ... + 126887.

It is an arithmetic number, because the mean of its divisors is an integer number (15225840).

Almost surely, 2^240156138 is an apocalyptic number.

240156138 is an abundant number, since it is smaller than the sum of its proper divisors (247070742).

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

240156138 is a wasteful number, since it uses less digits than its factorization.

240156138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 240156138 is about 15496.9718977612. The cubic root of 240156138 is about 621.5812378287.

The spelling of 240156138 in words is "two hundred forty million, one hundred fifty-six thousand, one hundred thirty-eight".