1143405870 has 16 divisors (see below), whose sum is σ = 2744174160. Its totient is φ = 304908224.

The previous prime is 1143405869. The next prime is 1143405871. The reversal of 1143405870 is 785043411.

1143405870 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1143405869) and next prime (1143405871).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143405871) 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, 19056735 + ... + 19056794.

It is an arithmetic number, because the mean of its divisors is an integer number (171510885).

Almost surely, 2^1143405870 is an apocalyptic number.

1143405870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1143405870 is an abundant number, since it is smaller than the sum of its proper divisors (1600768290).

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

1143405870 is a wasteful number, since it uses less digits than its factorization.

1143405870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38113539.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1143405870 is about 33814.2849990947. The cubic root of 1143405870 is about 1045.6832204067.

The spelling of 1143405870 in words is "one billion, one hundred forty-three million, four hundred five thousand, eight hundred seventy".