90541820 has 24 divisors (see below), whose sum is σ = 191511600. Its totient is φ = 35955072.

The previous prime is 90541819. The next prime is 90541877. The reversal of 90541820 is 2814509.

90541820 is nontrivially palindromic in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13505 + ... + 19064.

It is an arithmetic number, because the mean of its divisors is an integer number (7979650).

Almost surely, 2^90541820 is an apocalyptic number.

It is an amenable number.

90541820 is an abundant number, since it is smaller than the sum of its proper divisors (100969780).

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

90541820 is a wasteful number, since it uses less digits than its factorization.

90541820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32717 (or 32715 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 90541820 is about 9515.3465517552. The cubic root of 90541820 is about 449.0379777500.

The spelling of 90541820 in words is "ninety million, five hundred forty-one thousand, eight hundred twenty".