144139400 has 24 divisors (see below), whose sum is σ = 335124570. Its totient is φ = 57655680.

The previous prime is 144139399. The next prime is 144139403. The reversal of 144139400 is 4931441.

It can be written as a sum of positive squares in 3 ways, for example, as 122367844 + 21771556 = 11062^2 + 4666^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 144139400.

It is not an unprimeable number, because it can be changed into a prime (144139403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360149 + ... + 360548.

Almost surely, 2^144139400 is an apocalyptic number.

144139400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144139400 is an abundant number, since it is smaller than the sum of its proper divisors (190985170).

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

144139400 is a wasteful number, since it uses less digits than its factorization.

144139400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720713 (or 720704 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 144139400 is about 12005.8069283160. The cubic root of 144139400 is about 524.3173591782.

The spelling of 144139400 in words is "one hundred forty-four million, one hundred thirty-nine thousand, four hundred".