142642728 has 64 divisors (see below), whose sum is σ = 417096000. Its totient is φ = 45043776.

The previous prime is 142642727. The next prime is 142642729. The reversal of 142642728 is 827246241.

142642728 is a `hidden beast` number, since 1 + 4 + 2 + 642 + 7 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (142642727) and next prime (142642729).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 142642692 and 142642701.

It is not an unprimeable number, because it can be changed into a prime (142642727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13275 + ... + 21482.

It is an arithmetic number, because the mean of its divisors is an integer number (6517125).

Almost surely, 2^142642728 is an apocalyptic number.

142642728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

142642728 is an abundant number, since it is smaller than the sum of its proper divisors (274453272).

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

142642728 is a wasteful number, since it uses less digits than its factorization.

142642728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34791 (or 34781 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 142642728 is about 11943.3131081790. The cubic root of 142642728 is about 522.4962911147.

Adding to 142642728 its reverse (827246241), we get a palindrome (969888969).

The spelling of 142642728 in words is "one hundred forty-two million, six hundred forty-two thousand, seven hundred twenty-eight".