154212240 has 320 divisors, whose sum is σ = 615960576. Its totient is φ = 31021056.

The previous prime is 154212221. The next prime is 154212251. The reversal of 154212240 is 42212451.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 63 ways as a sum of consecutive naturals, for example, 502167 + ... + 502473.

Almost surely, 2^154212240 is an apocalyptic number.

154212240 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 154212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307980288).

154212240 is an abundant number, since it is smaller than the sum of its proper divisors (461748336).

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

154212240 is a wasteful number, since it uses less digits than its factorization.

154212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 154212240 is about 12418.2220949700. Note that the first 3 decimals coincide. The cubic root of 154212240 is about 536.2569681937.

Adding to 154212240 its reverse (42212451), we get a palindrome (196424691).

The spelling of 154212240 in words is "one hundred fifty-four million, two hundred twelve thousand, two hundred forty".