90923646 has 64 divisors (see below), whose sum is σ = 209640960. Its totient is φ = 26019840.

The previous prime is 90923641. The next prime is 90923647. The reversal of 90923646 is 64632909.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90923641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134766 + ... + 135438.

It is an arithmetic number, because the mean of its divisors is an integer number (3275640).

Almost surely, 2^90923646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90923646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104820480).

90923646 is an abundant number, since it is smaller than the sum of its proper divisors (118717314).

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

90923646 is a wasteful number, since it uses less digits than its factorization.

90923646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 90923646 is about 9535.3891373137. The cubic root of 90923646 is about 449.6683086595.

The spelling of 90923646 in words is "ninety million, nine hundred twenty-three thousand, six hundred forty-six".