90909942 has 8 divisors (see below), whose sum is σ = 181819896. Its totient is φ = 30303312.

The previous prime is 90909919. The next prime is 90909979. The reversal of 90909942 is 24990909.

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

90909942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 90909894 and 90909903.

It is a congruent number.

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, 7575823 + ... + 7575834.

It is an arithmetic number, because the mean of its divisors is an integer number (22727487).

Almost surely, 2^90909942 is an apocalyptic number.

90909942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90909942 is a wasteful number, since it uses less digits than its factorization.

90909942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15151662.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 90909942 is about 9534.6705239353. The cubic root of 90909942 is about 449.6457162082.

The spelling of 90909942 in words is "ninety million, nine hundred nine thousand, nine hundred forty-two".