144742730 has 64 divisors (see below), whose sum is σ = 295612416. Its totient is φ = 50568000.

The previous prime is 144742729. The next prime is 144742733. The reversal of 144742730 is 37247441.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (144742733) 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, 335615 + ... + 336045.

It is an arithmetic number, because the mean of its divisors is an integer number (4618944).

Almost surely, 2^144742730 is an apocalyptic number.

144742730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144742730 is an abundant number, since it is smaller than the sum of its proper divisors (150869686).

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

144742730 is a wasteful number, since it uses less digits than its factorization.

144742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 144742730 is about 12030.9072808330. The cubic root of 144742730 is about 525.0478928342.

The spelling of 144742730 in words is "one hundred forty-four million, seven hundred forty-two thousand, seven hundred thirty".