90422784 has 160 divisors (see below), whose sum is σ = 277601280. Its totient is φ = 29030400.

The previous prime is 90422777. The next prime is 90422791. The reversal of 90422784 is 48722409.

It is an interprime number because it is at equal distance from previous prime (90422777) and next prime (90422791).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428439 + ... + 428649.

It is an arithmetic number, because the mean of its divisors is an integer number (1735008).

Almost surely, 2^90422784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90422784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138800640).

90422784 is an abundant number, since it is smaller than the sum of its proper divisors (187178496).

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

90422784 is a wasteful number, since it uses less digits than its factorization.

90422784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 90422784 is about 9509.0895463236. The cubic root of 90422784 is about 448.8411069328.

The spelling of 90422784 in words is "ninety million, four hundred twenty-two thousand, seven hundred eighty-four".