142290840 has 64 divisors (see below), whose sum is σ = 428081760. Its totient is φ = 37836800.

The previous prime is 142290821. The next prime is 142290871. The reversal of 142290840 is 48092241.

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

It is a junction number, because it is equal to n+sod(n) for n = 142290798 and 142290807.

It is a congruent number.

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, 46642 + ... + 49598.

Almost surely, 2^142290840 is an apocalyptic number.

142290840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142290840 is an abundant number, since it is smaller than the sum of its proper divisors (285790920).

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

142290840 is a wasteful number, since it uses less digits than its factorization.

142290840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 142290840 is about 11928.5724208725. The cubic root of 142290840 is about 522.0662853832.

The spelling of 142290840 in words is "one hundred forty-two million, two hundred ninety thousand, eight hundred forty".