142440304 has 20 divisors (see below), whose sum is σ = 276188176. Its totient is φ = 71165952.

The previous prime is 142440293. The next prime is 142440323. The reversal of 142440304 is 403044241.

It is a super-2 number, since 2×142440304² = 40578480407224832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26032 + ... + 31024.

Almost surely, 2^142440304 is an apocalyptic number.

It is an amenable number.

142440304 is a deficient number, since it is larger than the sum of its proper divisors (133747872).

142440304 is a wasteful number, since it uses less digits than its factorization.

142440304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142440304 is about 11934.8357341021. The cubic root of 142440304 is about 522.2490163071.

Adding to 142440304 its reverse (403044241), we get a palindrome (545484545).

The spelling of 142440304 in words is "one hundred forty-two million, four hundred forty thousand, three hundred four".