142487028 has 18 divisors (see below), whose sum is σ = 360175634. Its totient is φ = 47495664.

The previous prime is 142487027. The next prime is 142487039. The reversal of 142487028 is 820784241.

It can be written as a sum of positive squares in only one way, i.e., 124947684 + 17539344 = 11178^2 + 4188^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3957973 = 142487028 / (1 + 4 + 2 + 4 + 8 + 7 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 142486983 and 142487001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142487027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1978951 + ... + 1979022.

Almost surely, 2^142487028 is an apocalyptic number.

142487028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

142487028 is an abundant number, since it is smaller than the sum of its proper divisors (217688606).

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

142487028 is a wasteful number, since it uses less digits than its factorization.

142487028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957983 (or 3957978 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 142487028 is about 11936.7930366577. The cubic root of 142487028 is about 522.3061136659.

The spelling of 142487028 in words is "one hundred forty-two million, four hundred eighty-seven thousand, twenty-eight".