154021440 has 112 divisors (see below), whose sum is σ = 495165888. Its totient is φ = 40556544.

The previous prime is 154021393. The next prime is 154021451. The reversal of 154021440 is 44120451.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 78714 + ... + 80646.

It is an arithmetic number, because the mean of its divisors is an integer number (4421124).

Almost surely, 2^154021440 is an apocalyptic number.

154021440 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 154021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247582944).

154021440 is an abundant number, since it is smaller than the sum of its proper divisors (341144448).

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

154021440 is a wasteful number, since it uses less digits than its factorization.

154021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2026 counting only the distinct ones).

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

The square root of 154021440 is about 12410.5374581442. The cubic root of 154021440 is about 536.0357145579.

Adding to 154021440 its reverse (44120451), we get a palindrome (198141891).

The spelling of 154021440 in words is "one hundred fifty-four million, twenty-one thousand, four hundred forty".