90191946 has 16 divisors (see below), whose sum is σ = 194259744. Its totient is φ = 27751344.

The previous prime is 90191921. The next prime is 90191999. The reversal of 90191946 is 64919109.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578076 + ... + 578231.

It is an arithmetic number, because the mean of its divisors is an integer number (12141234).

Almost surely, 2^90191946 is an apocalyptic number.

90191946 is an abundant number, since it is smaller than the sum of its proper divisors (104067798).

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

90191946 is a wasteful number, since it uses less digits than its factorization.

90191946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156325.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 90191946 is about 9496.9440347935. The cubic root of 90191946 is about 448.4588364787.

The spelling of 90191946 in words is "ninety million, one hundred ninety-one thousand, nine hundred forty-six".