105143440 has 40 divisors (see below), whose sum is σ = 244984320. Its totient is φ = 41966976.

The previous prime is 105143417. The next prime is 105143447. The reversal of 105143440 is 44341501.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×105143440² = 22110285950067200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105143447) 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, 45841 + ... + 48079.

It is an arithmetic number, because the mean of its divisors is an integer number (6124608).

Almost surely, 2^105143440 is an apocalyptic number.

105143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105143440 is an abundant number, since it is smaller than the sum of its proper divisors (139840880).

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

105143440 is a wasteful number, since it uses less digits than its factorization.

105143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839 (or 2833 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 105143440 is about 10253.9475325359. The cubic root of 105143440 is about 471.9841275904.

Adding to 105143440 its reverse (44341501), we get a palindrome (149484941).

The spelling of 105143440 in words is "one hundred five million, one hundred forty-three thousand, four hundred forty".