144023690 has 16 divisors (see below), whose sum is σ = 260017992. Its totient is φ = 57437184.

The previous prime is 144023687. The next prime is 144023701. The reversal of 144023690 is 96320441.

It can be written as a sum of positive squares in 4 ways, for example, as 115068529 + 28955161 = 10727^2 + 5381^2 .

It is a super-2 number, since 2×144023690² = 41485646562432200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17999 + ... + 24738.

Almost surely, 2^144023690 is an apocalyptic number.

144023690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144023690 is a deficient number, since it is larger than the sum of its proper divisors (115994302).

144023690 is a wasteful number, since it uses less digits than its factorization.

144023690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43081.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 144023690 is about 12000.9870427394. The cubic root of 144023690 is about 524.1770204896.

The spelling of 144023690 in words is "one hundred forty-four million, twenty-three thousand, six hundred ninety".