142891728 has 40 divisors (see below), whose sum is σ = 421871808. Its totient is φ = 40826112.

The previous prime is 142891711. The next prime is 142891747. The reversal of 142891728 is 827198241.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 142891728.

It is a congruent number.

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, 212301 + ... + 212972.

Almost surely, 2^142891728 is an apocalyptic number.

It is an amenable number.

142891728 is an abundant number, since it is smaller than the sum of its proper divisors (278980080).

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

142891728 is a wasteful number, since it uses less digits than its factorization.

142891728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425291 (or 425285 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 142891728 is about 11953.7328061154. The cubic root of 142891728 is about 522.8001410411.

The spelling of 142891728 in words is "one hundred forty-two million, eight hundred ninety-one thousand, seven hundred twenty-eight".