90870938 has 8 divisors (see below), whose sum is σ = 138878388. Its totient is φ = 44578144.

The previous prime is 90870919. The next prime is 90870959. The reversal of 90870938 is 83907809.

It can be written as a sum of positive squares in 2 ways, for example, as 79085449 + 11785489 = 8893^2 + 3433^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 428531 + ... + 428742.

Almost surely, 2^90870938 is an apocalyptic number.

90870938 is a deficient number, since it is larger than the sum of its proper divisors (48007450).

90870938 is a wasteful number, since it uses less digits than its factorization.

90870938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857328.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 90870938 is about 9532.6249270597. The cubic root of 90870938 is about 449.5814016793.

The spelling of 90870938 in words is "ninety million, eight hundred seventy thousand, nine hundred thirty-eight".