90191948 has 54 divisors (see below), whose sum is σ = 201866868. Its totient is φ = 35130480.

The previous prime is 90191921. The next prime is 90191999. The reversal of 90191948 is 84919109.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21815 + ... + 25617.

Almost surely, 2^90191948 is an apocalyptic number.

90191948 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90191948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100933434).

90191948 is an abundant number, since it is smaller than the sum of its proper divisors (111674920).

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

90191948 is a wasteful number, since it uses less digits than its factorization.

90191948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 90191948 is about 9496.9441400905. The cubic root of 90191948 is about 448.4588397935.

The spelling of 90191948 in words is "ninety million, one hundred ninety-one thousand, nine hundred forty-eight".