90288402 has 8 divisors (see below), whose sum is σ = 180576816. Its totient is φ = 30096132.

The previous prime is 90288353. The next prime is 90288403. The reversal of 90288402 is 20488209.

It is a sphenic number, since it is the product of 3 distinct primes.

90288402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90288403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7524028 + ... + 7524039.

It is an arithmetic number, because the mean of its divisors is an integer number (22572102).

Almost surely, 2^90288402 is an apocalyptic number.

90288402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90288402 is a wasteful number, since it uses less digits than its factorization.

90288402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048072.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 90288402 is about 9502.0209429363. The cubic root of 90288402 is about 448.6186479930.

The spelling of 90288402 in words is "ninety million, two hundred eighty-eight thousand, four hundred two".