143971992 has 80 divisors (see below), whose sum is σ = 413166600. Its totient is φ = 46811520.

The previous prime is 143971981. The next prime is 143971999. The reversal of 143971992 is 299179341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143971999) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23859 + ... + 29277.

Almost surely, 2^143971992 is an apocalyptic number.

143971992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143971992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206583300).

143971992 is an abundant number, since it is smaller than the sum of its proper divisors (269194608).

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

143971992 is a wasteful number, since it uses less digits than its factorization.

143971992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478 (or 5465 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 143971992 is about 11998.8329432491. The cubic root of 143971992 is about 524.1142943583.

The spelling of 143971992 in words is "one hundred forty-three million, nine hundred seventy-one thousand, nine hundred ninety-two".