144998640 has 80 divisors (see below), whose sum is σ = 499447200. Its totient is φ = 38665728.

The previous prime is 144998639. The next prime is 144998641. The reversal of 144998640 is 46899441.

It is an interprime number because it is at equal distance from previous prime (144998639) and next prime (144998641).

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144998641) 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, 31405 + ... + 35724.

It is an arithmetic number, because the mean of its divisors is an integer number (6243090).

Almost surely, 2^144998640 is an apocalyptic number.

144998640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144998640 is an abundant number, since it is smaller than the sum of its proper divisors (354448560).

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

144998640 is a wasteful number, since it uses less digits than its factorization.

144998640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67151 (or 67139 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 144998640 is about 12041.5381077336. The cubic root of 144998640 is about 525.3571447431.

The spelling of 144998640 in words is "one hundred forty-four million, nine hundred ninety-eight thousand, six hundred forty".