90771954 has 64 divisors (see below), whose sum is σ = 226243584. Its totient is φ = 23639616.

The previous prime is 90771931. The next prime is 90771979. The reversal of 90771954 is 45917709.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44317 + ... + 46319.

It is an arithmetic number, because the mean of its divisors is an integer number (3535056).

Almost surely, 2^90771954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90771954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113121792).

90771954 is an abundant number, since it is smaller than the sum of its proper divisors (135471630).

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

90771954 is a wasteful number, since it uses less digits than its factorization.

90771954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 90771954 is about 9527.4316581123. The cubic root of 90771954 is about 449.4181021896.

The spelling of 90771954 in words is "ninety million, seven hundred seventy-one thousand, nine hundred fifty-four".