144345690 has 48 divisors (see below), whose sum is σ = 377414856. Its totient is φ = 38275200.

The previous prime is 144345661. The next prime is 144345697. The reversal of 144345690 is 96543441.

It can be written as a sum of positive squares in 4 ways, for example, as 115412049 + 28933641 = 10743^2 + 5379^2 .

It is a super-2 number, since 2×144345690² = 41671356443152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144345697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11860 + ... + 20720.

Almost surely, 2^144345690 is an apocalyptic number.

144345690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 144345690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188707428).

144345690 is an abundant number, since it is smaller than the sum of its proper divisors (233069166).

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

144345690 is a wasteful number, since it uses less digits than its factorization.

144345690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9055 (or 9052 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 144345690 is about 12014.3951158600. The cubic root of 144345690 is about 524.5673714797.

The spelling of 144345690 in words is "one hundred forty-four million, three hundred forty-five thousand, six hundred ninety".