142888730 has 8 divisors (see below), whose sum is σ = 257199732. Its totient is φ = 57155488.

The previous prime is 142888727. The next prime is 142888747. The reversal of 142888730 is 37888241.

It can be written as a sum of positive squares in 2 ways, for example, as 140730769 + 2157961 = 11863^2 + 1469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×142888730² = 40834378322025800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144427 + ... + 7144446.

Almost surely, 2^142888730 is an apocalyptic number.

142888730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142888730 is a deficient number, since it is larger than the sum of its proper divisors (114311002).

142888730 is a wasteful number, since it uses less digits than its factorization.

142888730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288880.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 142888730 is about 11953.6074052982. The cubic root of 142888730 is about 522.7964847394.

The spelling of 142888730 in words is "one hundred forty-two million, eight hundred eighty-eight thousand, seven hundred thirty".