90915842 has 8 divisors (see below), whose sum is σ = 136424316. Its totient is φ = 45441072.

The previous prime is 90915833. The next prime is 90915859. The reversal of 90915842 is 24851909.

It can be written as a sum of positive squares in 2 ways, for example, as 74666881 + 16248961 = 8641^2 + 4031^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 90915796 and 90915805.

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, 8 + ... + 13484.

Almost surely, 2^90915842 is an apocalyptic number.

90915842 is a deficient number, since it is larger than the sum of its proper divisors (45508474).

90915842 is a wasteful number, since it uses less digits than its factorization.

90915842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16852.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 90915842 is about 9534.9799160774. The cubic root of 90915842 is about 449.6554432424.

The spelling of 90915842 in words is "ninety million, nine hundred fifteen thousand, eight hundred forty-two".