90947142 has 96 divisors (see below), whose sum is σ = 234692640. Its totient is φ = 25090560.

The previous prime is 90947141. The next prime is 90947159. The reversal of 90947142 is 24174909.

It is a junction number, because it is equal to n+sod(n) for n = 90947097 and 90947106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90947141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228888 + ... + 229284.

It is an arithmetic number, because the mean of its divisors is an integer number (2444715).

Almost surely, 2^90947142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90947142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117346320).

90947142 is an abundant number, since it is smaller than the sum of its proper divisors (143745498).

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

90947142 is a wasteful number, since it uses less digits than its factorization.

90947142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90947142 is about 9536.6210997397. The cubic root of 90947142 is about 449.7070389462.

The spelling of 90947142 in words is "ninety million, nine hundred forty-seven thousand, one hundred forty-two".