154921844 has 48 divisors (see below), whose sum is σ = 342343680. Its totient is φ = 59585760.

The previous prime is 154921831. The next prime is 154921847. The reversal of 154921844 is 448129451.

It is a junction number, because it is equal to n+sod(n) for n = 154921798 and 154921807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154921847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21149 + ... + 27515.

It is an arithmetic number, because the mean of its divisors is an integer number (7132160).

Almost surely, 2^154921844 is an apocalyptic number.

154921844 is a gapful number since it is divisible by the number (14) 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 154921844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171171840).

154921844 is an abundant number, since it is smaller than the sum of its proper divisors (187421836).

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

154921844 is a wasteful number, since it uses less digits than its factorization.

154921844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468 (or 6466 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 154921844 is about 12446.7603817218. The cubic root of 154921844 is about 537.0782344140.

The spelling of 154921844 in words is "one hundred fifty-four million, nine hundred twenty-one thousand, eight hundred forty-four".