103143440 has 40 divisors (see below), whose sum is σ = 240252480. Its totient is φ = 41181056.

The previous prime is 103143407. The next prime is 103143451. The reversal of 103143440 is 44341301.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 65381 + ... + 66939.

It is an arithmetic number, because the mean of its divisors is an integer number (6006312).

Almost surely, 2^103143440 is an apocalyptic number.

103143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103143440 is an abundant number, since it is smaller than the sum of its proper divisors (137109040).

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

103143440 is a wasteful number, since it uses less digits than its factorization.

103143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 103143440 is about 10155.9558880491. The cubic root of 103143440 is about 468.9723131547.

Adding to 103143440 its reverse (44341301), we get a palindrome (147484741).

The spelling of 103143440 in words is "one hundred three million, one hundred forty-three thousand, four hundred forty".