143969436 has 36 divisors (see below), whose sum is σ = 391918072. Its totient is φ = 44298144.

The previous prime is 143969431. The next prime is 143969453. The reversal of 143969436 is 634969341.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 143969391 and 143969400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143969431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153346 + ... + 154281.

Almost surely, 2^143969436 is an apocalyptic number.

It is an amenable number.

143969436 is an abundant number, since it is smaller than the sum of its proper divisors (247948636).

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

143969436 is a wasteful number, since it uses less digits than its factorization.

143969436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307650 (or 307645 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 143969436 is about 11998.7264324177. The cubic root of 143969436 is about 524.1111927271. Note that the first 4 decimals are identical.

It can be divided in two parts, 14396 and 9436, that added together give a palindrome (23832).

The spelling of 143969436 in words is "one hundred forty-three million, nine hundred sixty-nine thousand, four hundred thirty-six".