90191412 has 36 divisors (see below), whose sum is σ = 231853440. Its totient is φ = 29553552.

The previous prime is 90191411. The next prime is 90191417. The reversal of 90191412 is 21419109.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90191411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19108 + ... + 23355.

Almost surely, 2^90191412 is an apocalyptic number.

It is an amenable number.

90191412 is an abundant number, since it is smaller than the sum of its proper divisors (141662028).

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

90191412 is a wasteful number, since it uses less digits than its factorization.

90191412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42532 (or 42527 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 90191412 is about 9496.9159204449. The cubic root of 90191412 is about 448.4579514126.

The spelling of 90191412 in words is "ninety million, one hundred ninety-one thousand, four hundred twelve".