144897840 has 60 divisors (see below), whose sum is σ = 486617664. Its totient is φ = 38639232.

The previous prime is 144897829. The next prime is 144897853. The reversal of 144897840 is 48798441.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99904 + ... + 101343.

Almost surely, 2^144897840 is an apocalyptic number.

144897840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144897840 is an abundant number, since it is smaller than the sum of its proper divisors (341719824).

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

144897840 is a wasteful number, since it uses less digits than its factorization.

144897840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201266 (or 201257 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 144897840 is about 12037.3518682474. The cubic root of 144897840 is about 525.2353774488.

The spelling of 144897840 in words is "one hundred forty-four million, eight hundred ninety-seven thousand, eight hundred forty".