90470140 has 48 divisors (see below), whose sum is σ = 198031680. Its totient is φ = 34675200.

The previous prime is 90470131. The next prime is 90470147. The reversal of 90470140 is 4107409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90470147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87064 + ... + 88096.

It is an arithmetic number, because the mean of its divisors is an integer number (4125660).

Almost surely, 2^90470140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90470140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99015840).

90470140 is an abundant number, since it is smaller than the sum of its proper divisors (107561540).

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

90470140 is a wasteful number, since it uses less digits than its factorization.

90470140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 90470140 is about 9511.5792589874. The cubic root of 90470140 is about 448.9194485816.

Adding to 90470140 its reverse (4107409), we get a palindrome (94577549).

The spelling of 90470140 in words is "ninety million, four hundred seventy thousand, one hundred forty".