342221240 has 32 divisors (see below), whose sum is σ = 783054000. Its totient is φ = 134567424.

The previous prime is 342221233. The next prime is 342221249. The reversal of 342221240 is 42122243.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342221249) 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, 70145 + ... + 74864.

Almost surely, 2^342221240 is an apocalyptic number.

It is an amenable number.

342221240 is an abundant number, since it is smaller than the sum of its proper divisors (440832760).

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

342221240 is a wasteful number, since it uses less digits than its factorization.

342221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145079 (or 145075 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 342221240 is about 18499.2226863725. Note that the first 3 decimals coincide. The cubic root of 342221240 is about 699.4698298505.

Adding to 342221240 its reverse (42122243), we get a palindrome (384343483).

The spelling of 342221240 in words is "three hundred forty-two million, two hundred twenty-one thousand, two hundred forty".