90284919 has 8 divisors (see below), whose sum is σ = 120482160. Its totient is φ = 60138816.

The previous prime is 90284899. The next prime is 90284923. The reversal of 90284919 is 91948209.

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

It is not a de Polignac number, because 90284919 - 2¹² = 90280823 is a prime.

It is a super-2 number, since 2×90284919² = 16302733197673122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90284939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8454 + ... + 15875.

It is an arithmetic number, because the mean of its divisors is an integer number (15060270).

Almost surely, 2^90284919 is an apocalyptic number.

90284919 is a deficient number, since it is larger than the sum of its proper divisors (30197241).

90284919 is a wasteful number, since it uses less digits than its factorization.

90284919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25569.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 90284919 is about 9501.8376643679. The cubic root of 90284919 is about 448.6128792239.

The spelling of 90284919 in words is "ninety million, two hundred eighty-four thousand, nine hundred nineteen".