144499840 has 32 divisors (see below), whose sum is σ = 345446460. Its totient is φ = 57799680.

The previous prime is 144499829. The next prime is 144499879. The reversal of 144499840 is 48994441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 133263936 + 11235904 = 11544^2 + 3352^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112251 + ... + 113530.

Almost surely, 2^144499840 is an apocalyptic number.

144499840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144499840 is an abundant number, since it is smaller than the sum of its proper divisors (200946620).

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

144499840 is an equidigital number, since it uses as much as digits as its factorization.

144499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225800 (or 225788 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 144499840 is about 12020.8086250468. The cubic root of 144499840 is about 524.7540374678.

The spelling of 144499840 in words is "one hundred forty-four million, four hundred ninety-nine thousand, eight hundred forty".