90471880 has 64 divisors (see below), whose sum is σ = 219801600. Its totient is φ = 33411840.

The previous prime is 90471859. The next prime is 90471881. The reversal of 90471880 is 8817409.

It is a super-2 number, since 2×90471880² = 16370322141468800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90471881) 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, 24985 + ... + 28375.

It is an arithmetic number, because the mean of its divisors is an integer number (3434400).

Almost surely, 2^90471880 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 90471880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109900800).

90471880 is an abundant number, since it is smaller than the sum of its proper divisors (129329720).

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

90471880 is a wasteful number, since it uses less digits than its factorization.

90471880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454 (or 3450 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 90471880 is about 9511.6707260081. The cubic root of 90471880 is about 448.9223265655.

The spelling of 90471880 in words is "ninety million, four hundred seventy-one thousand, eight hundred eighty".