90470440 has 32 divisors (see below), whose sum is σ = 204392160. Its totient is φ = 36040000.

The previous prime is 90470407. The next prime is 90470453. The reversal of 90470440 is 4407409.

It is a junction number, because it is equal to n+sod(n) for n = 90470399 and 90470408.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5535 + ... + 14545.

It is an arithmetic number, because the mean of its divisors is an integer number (6387255).

Almost surely, 2^90470440 is an apocalyptic number.

It is an amenable number.

90470440 is an abundant number, since it is smaller than the sum of its proper divisors (113921720).

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

90470440 is a wasteful number, since it uses less digits than its factorization.

90470440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273 (or 9269 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 90470440 is about 9511.5950292262. The cubic root of 90470440 is about 448.9199447883.

Adding to 90470440 its reverse (4407409), we get a palindrome (94877849).

The spelling of 90470440 in words is "ninety million, four hundred seventy thousand, four hundred forty".