154068138 has 48 divisors (see below), whose sum is σ = 388717056. Its totient is φ = 43187040.

The previous prime is 154068137. The next prime is 154068139. The reversal of 154068138 is 831860451.

154068138 is a `hidden beast` number, since 1 + 540 + 6 + 81 + 38 = 666.

154068138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (154068137) and next prime (154068139).

It is a super-2 number, since 2×154068138² = 47473982293574088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (154068137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4858 + ... + 18213.

It is an arithmetic number, because the mean of its divisors is an integer number (8098272).

Almost surely, 2^154068138 is an apocalyptic number.

154068138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

154068138 is an abundant number, since it is smaller than the sum of its proper divisors (234648918).

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

154068138 is a wasteful number, since it uses less digits than its factorization.

154068138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23139 (or 23136 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 154068138 is about 12412.4187006401. The cubic root of 154068138 is about 536.0898829179.

The spelling of 154068138 in words is "one hundred fifty-four million, sixty-eight thousand, one hundred thirty-eight".