142788290 has 16 divisors (see below), whose sum is σ = 259422912. Its totient is φ = 56581104.

The previous prime is 142788241. The next prime is 142788293. The reversal of 142788290 is 92887241.

It is a super-2 number, since 2×142788290² = 40776991522248200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142788293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65654 + ... + 67793.

It is an arithmetic number, because the mean of its divisors is an integer number (16213932).

Almost surely, 2^142788290 is an apocalyptic number.

142788290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142788290 is a deficient number, since it is larger than the sum of its proper divisors (116634622).

142788290 is a wasteful number, since it uses less digits than its factorization.

142788290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133561.

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

The square root of 142788290 is about 11949.4054245389. The cubic root of 142788290 is about 522.6739605273.

The spelling of 142788290 in words is "one hundred forty-two million, seven hundred eighty-eight thousand, two hundred ninety".