154815420 has 96 divisors (see below), whose sum is σ = 460051200. Its totient is φ = 38790144.

The previous prime is 154815389. The next prime is 154815421. The reversal of 154815420 is 24518451.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154815421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157972 + ... + 158948.

It is an arithmetic number, because the mean of its divisors is an integer number (4792200).

Almost surely, 2^154815420 is an apocalyptic number.

154815420 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 154815420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230025600).

154815420 is an abundant number, since it is smaller than the sum of its proper divisors (305235780).

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

154815420 is a wasteful number, since it uses less digits than its factorization.

154815420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 154815420 is about 12442.4844785919. The cubic root of 154815420 is about 536.9552237702.

The spelling of 154815420 in words is "one hundred fifty-four million, eight hundred fifteen thousand, four hundred twenty".