144428730 has 32 divisors (see below), whose sum is σ = 361701504. Its totient is φ = 36839616.

The previous prime is 144428699. The next prime is 144428737. The reversal of 144428730 is 37824441.

It is a junction number, because it is equal to n+sod(n) for n = 144428691 and 144428700.

It is not an unprimeable number, because it can be changed into a prime (144428737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103969 + ... + 105348.

It is an arithmetic number, because the mean of its divisors is an integer number (11303172).

Almost surely, 2^144428730 is an apocalyptic number.

144428730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144428730 is an abundant number, since it is smaller than the sum of its proper divisors (217272774).

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

144428730 is a wasteful number, since it uses less digits than its factorization.

144428730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209350.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 144428730 is about 12017.8504733584. The cubic root of 144428730 is about 524.6679442183.

The spelling of 144428730 in words is "one hundred forty-four million, four hundred twenty-eight thousand, seven hundred thirty".