90471052 has 96 divisors (see below), whose sum is σ = 199987200. Its totient is φ = 35703360.

The previous prime is 90471049. The next prime is 90471067. The reversal of 90471052 is 25017409.

It is a happy number.

It is a super-2 number, since 2×90471052² = 16370022499973408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 90471052.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1483102 + ... + 1483162.

It is an arithmetic number, because the mean of its divisors is an integer number (2083200).

Almost surely, 2^90471052 is an apocalyptic number.

90471052 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90471052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99993600).

90471052 is an abundant number, since it is smaller than the sum of its proper divisors (109516148).

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

90471052 is a wasteful number, since it uses less digits than its factorization.

90471052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 90471052 is about 9511.6272004321. The cubic root of 90471052 is about 448.9209570467.

The spelling of 90471052 in words is "ninety million, four hundred seventy-one thousand, fifty-two".