93939090 has 128 divisors (see below), whose sum is σ = 268849152. Its totient is φ = 20563200.

The previous prime is 93939073. The next prime is 93939103. The reversal of 93939090 is 9093939.

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 63 ways as a sum of consecutive naturals, for example, 911979 + ... + 912081.

It is an arithmetic number, because the mean of its divisors is an integer number (2100384).

Almost surely, 2^93939090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 93939090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134424576).

93939090 is an abundant number, since it is smaller than the sum of its proper divisors (174910062).

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

93939090 is a wasteful number, since it uses less digits than its factorization.

93939090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 59049, while the sum is 42.

The square root of 93939090 is about 9692.2180124056. The cubic root of 93939090 is about 454.5853647260.

The spelling of 93939090 in words is "ninety-three million, nine hundred thirty-nine thousand, ninety".