154540240 has 20 divisors (see below), whose sum is σ = 359306244. Its totient is φ = 61816064.

The previous prime is 154540219. The next prime is 154540283. The reversal of 154540240 is 42045451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 96353856 + 58186384 = 9816^2 + 7628^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965797 + ... + 965956.

Almost surely, 2^154540240 is an apocalyptic number.

154540240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154540240 is an abundant number, since it is smaller than the sum of its proper divisors (204766004).

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

154540240 is a wasteful number, since it uses less digits than its factorization.

154540240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931766 (or 1931760 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 154540240 is about 12431.4214794608. The cubic root of 154540240 is about 536.6368942157.

Adding to 154540240 its reverse (42045451), we get a palindrome (196585691).

The spelling of 154540240 in words is "one hundred fifty-four million, five hundred forty thousand, two hundred forty".