144445690 has 16 divisors (see below), whose sum is σ = 260757792. Its totient is φ = 57610384.

The previous prime is 144445673. The next prime is 144445699. The reversal of 144445690 is 96544441.

It is a super-2 number, since 2×144445690² = 41729114719152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144445699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17344 + ... + 24283.

It is an arithmetic number, because the mean of its divisors is an integer number (16297362).

Almost surely, 2^144445690 is an apocalyptic number.

144445690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144445690 is a deficient number, since it is larger than the sum of its proper divisors (116312102).

144445690 is a wasteful number, since it uses less digits than its factorization.

144445690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41981.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 144445690 is about 12018.5560696783. The cubic root of 144445690 is about 524.6884803449.

The spelling of 144445690 in words is "one hundred forty-four million, four hundred forty-five thousand, six hundred ninety".