202090042 has 32 divisors (see below), whose sum is σ = 397831680. Its totient is φ = 74591280.

The previous prime is 202090039. The next prime is 202090051. The reversal of 202090042 is 240090202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31608 + ... + 37459.

It is an arithmetic number, because the mean of its divisors is an integer number (12432240).

Almost surely, 2^202090042 is an apocalyptic number.

202090042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

202090042 is a deficient number, since it is larger than the sum of its proper divisors (195741638).

202090042 is a wasteful number, since it uses less digits than its factorization.

202090042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69106.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 202090042 is about 14215.8377171379. The cubic root of 202090042 is about 586.8335991184.

The spelling of 202090042 in words is "two hundred two million, ninety thousand, forty-two".