142838930 has 32 divisors (see below), whose sum is σ = 293179824. Its totient is φ = 49637376.

The previous prime is 142838929. The next prime is 142838953. The reversal of 142838930 is 39838241.

It can be written as a sum of positive squares in 8 ways, for example, as 57775201 + 85063729 = 7601^2 + 9223^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30107 + ... + 34526.

Almost surely, 2^142838930 is an apocalyptic number.

142838930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142838930 is an abundant number, since it is smaller than the sum of its proper divisors (150340894).

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

142838930 is a wasteful number, since it uses less digits than its factorization.

142838930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64670.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 142838930 is about 11951.5241705818. The cubic root of 142838930 is about 522.7357421598.

The spelling of 142838930 in words is "one hundred forty-two million, eight hundred thirty-eight thousand, nine hundred thirty".