142236390 has 32 divisors (see below), whose sum is σ = 341692416. Its totient is φ = 37893600.

The previous prime is 142236373. The next prime is 142236397. The reversal of 142236390 is 93632241.

142236390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142236397) 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, 48465 + ... + 51315.

It is an arithmetic number, because the mean of its divisors is an integer number (10677888).

Almost surely, 2^142236390 is an apocalyptic number.

142236390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142236390 is an abundant number, since it is smaller than the sum of its proper divisors (199456026).

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

142236390 is a wasteful number, since it uses less digits than its factorization.

142236390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 142236390 is about 11926.2898673477. The cubic root of 142236390 is about 521.9996843849. Note that the first 3 decimals are identical.

The spelling of 142236390 in words is "one hundred forty-two million, two hundred thirty-six thousand, three hundred ninety".