144638770 has 16 divisors (see below), whose sum is σ = 262099800. Its totient is φ = 57466624.

The previous prime is 144638731. The next prime is 144638783. The reversal of 144638770 is 77836441.

It can be written as a sum of positive squares in 4 ways, for example, as 118352641 + 26286129 = 10879^2 + 5127^2 .

It is a super-2 number, since 2×144638770² = 41840747574225800, 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, 47047 + ... + 50026.

Almost surely, 2^144638770 is an apocalyptic number.

144638770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144638770 is a deficient number, since it is larger than the sum of its proper divisors (117461030).

144638770 is a wasteful number, since it uses less digits than its factorization.

144638770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97229.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 144638770 is about 12026.5859661003. The cubic root of 144638770 is about 524.9221592832.

The spelling of 144638770 in words is "one hundred forty-four million, six hundred thirty-eight thousand, seven hundred seventy".