154220640 has 288 divisors, whose sum is σ = 579156480. Its totient is φ = 34384896.

The previous prime is 154220623. The next prime is 154220641. The reversal of 154220640 is 46022451.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 154220640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154220641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1858039 + ... + 1858121.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^154220640 is an apocalyptic number.

154220640 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 154220640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289578240).

154220640 is an abundant number, since it is smaller than the sum of its proper divisors (424935840).

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

154220640 is a wasteful number, since it uses less digits than its factorization.

154220640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 154220640 is about 12418.5603030303. The cubic root of 154220640 is about 536.2667047247.

The spelling of 154220640 in words is "one hundred fifty-four million, two hundred twenty thousand, six hundred forty".