154840140 has 384 divisors, whose sum is σ = 623185920. Its totient is φ = 31021056.

The previous prime is 154840123. The next prime is 154840141. The reversal of 154840140 is 41048451.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (154840141) 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 127 ways as a sum of consecutive naturals, for example, 1130152 + ... + 1130288.

It is an arithmetic number, because the mean of its divisors is an integer number (1622880).

Almost surely, 2^154840140 is an apocalyptic number.

154840140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154840140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311592960).

154840140 is an abundant number, since it is smaller than the sum of its proper divisors (468345780).

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

154840140 is a wasteful number, since it uses less digits than its factorization.

154840140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 154840140 is about 12443.4778096801. The cubic root of 154840140 is about 536.9838015151.

Adding to 154840140 its reverse (41048451), we get a palindrome (195888591).

The spelling of 154840140 in words is "one hundred fifty-four million, eight hundred forty thousand, one hundred forty".