90873520 has 20 divisors (see below), whose sum is σ = 211281120. Its totient is φ = 36349376.

The previous prime is 90873509. The next prime is 90873527. The reversal of 90873520 is 2537809.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (90873527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567880 + ... + 568039.

It is an arithmetic number, because the mean of its divisors is an integer number (10564056).

Almost surely, 2^90873520 is an apocalyptic number.

It is an amenable number.

90873520 is an abundant number, since it is smaller than the sum of its proper divisors (120407600).

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

90873520 is a wasteful number, since it uses less digits than its factorization.

90873520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135932 (or 1135926 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 90873520 is about 9532.7603557417. The cubic root of 90873520 is about 449.5856597631.

The spelling of 90873520 in words is "ninety million, eight hundred seventy-three thousand, five hundred twenty".