90285740 has 48 divisors (see below), whose sum is σ = 193771872. Its totient is φ = 35329536.

The previous prime is 90285737. The next prime is 90285749. The reversal of 90285740 is 4758209.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90285740.

It is not an unprimeable number, because it can be changed into a prime (90285749) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 227222 + ... + 227618.

It is an arithmetic number, because the mean of its divisors is an integer number (4036914).

Almost surely, 2^90285740 is an apocalyptic number.

It is an amenable number.

90285740 is an abundant number, since it is smaller than the sum of its proper divisors (103486132).

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

90285740 is a wasteful number, since it uses less digits than its factorization.

90285740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 90285740 is about 9501.8808664390. The cubic root of 90285740 is about 448.6142390304.

The spelling of 90285740 in words is "ninety million, two hundred eighty-five thousand, seven hundred forty".