142780928 has 40 divisors (see below), whose sum is σ = 293032212. Its totient is φ = 69451776.

The previous prime is 142780873. The next prime is 142780933. The reversal of 142780928 is 829087241.

It can be written as a sum of positive squares in 2 ways, for example, as 137545984 + 5234944 = 11728^2 + 2288^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15176 + ... + 22712.

Almost surely, 2^142780928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142780928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146516106).

142780928 is an abundant number, since it is smaller than the sum of its proper divisors (150251284).

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

142780928 is an frugal number, since it uses more digits than its factorization.

142780928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 142780928 is about 11949.0973717683. The cubic root of 142780928 is about 522.6649775502.

The spelling of 142780928 in words is "one hundred forty-two million, seven hundred eighty thousand, nine hundred twenty-eight".