154220720 has 80 divisors (see below), whose sum is σ = 379901280. Its totient is φ = 58060800.

The previous prime is 154220707. The next prime is 154220741. The reversal of 154220720 is 27022451.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 366110 + ... + 366530.

It is an arithmetic number, because the mean of its divisors is an integer number (4748766).

Almost surely, 2^154220720 is an apocalyptic number.

154220720 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 154220720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189950640).

154220720 is an abundant number, since it is smaller than the sum of its proper divisors (225680560).

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

154220720 is a wasteful number, since it uses less digits than its factorization.

154220720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 154220720 is about 12418.5635240152. The cubic root of 154220720 is about 536.2667974518.

The spelling of 154220720 in words is "one hundred fifty-four million, two hundred twenty thousand, seven hundred twenty".