90942842 has 8 divisors (see below), whose sum is σ = 137666100. Its totient is φ = 45054144.

The previous prime is 90942829. The next prime is 90942847. The reversal of 90942842 is 24824909.

It can be written as a sum of positive squares in 2 ways, for example, as 79727041 + 11215801 = 8929^2 + 3349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×90942842² = 16541201022073928, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 90942842 parts by 13486 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 90942796 and 90942805.

It is not an unprimeable number, because it can be changed into a prime (90942847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208367 + ... + 208802.

Almost surely, 2^90942842 is an apocalyptic number.

90942842 is a deficient number, since it is larger than the sum of its proper divisors (46723258).

90942842 is a wasteful number, since it uses less digits than its factorization.

90942842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417280.

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

The square root of 90942842 is about 9536.3956503492. The cubic root of 90942842 is about 449.6999514200.

The spelling of 90942842 in words is "ninety million, nine hundred forty-two thousand, eight hundred forty-two".