143478644 has 6 divisors (see below), whose sum is σ = 251087634. Its totient is φ = 71739320.

The previous prime is 143478611. The next prime is 143478661. The reversal of 143478644 is 446874341.

143478644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 136656100 + 6822544 = 11690^2 + 2612^2 .

It is a super-2 number, since 2×143478644² = 41172242568157472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17934827 + ... + 17934834.

It is an arithmetic number, because the mean of its divisors is an integer number (41847939).

Almost surely, 2^143478644 is an apocalyptic number.

It is an amenable number.

143478644 is a deficient number, since it is larger than the sum of its proper divisors (107608990).

143478644 is a wasteful number, since it uses less digits than its factorization.

143478644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35869665 (or 35869663 counting only the distinct ones).

The product of its digits is 258048, while the sum is 41.

The square root of 143478644 is about 11978.2571353265. The cubic root of 143478644 is about 523.5149494291.

The spelling of 143478644 in words is "one hundred forty-three million, four hundred seventy-eight thousand, six hundred forty-four".