90158140 has 48 divisors (see below), whose sum is σ = 201392352. Its totient is φ = 33785856.

The previous prime is 90158113. The next prime is 90158147. The reversal of 90158140 is 4185109.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90158099 and 90158108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90158147) 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, 95752 + ... + 96688.

It is an arithmetic number, because the mean of its divisors is an integer number (4195674).

Almost surely, 2^90158140 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 90158140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100696176).

90158140 is an abundant number, since it is smaller than the sum of its proper divisors (111234212).

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

90158140 is a wasteful number, since it uses less digits than its factorization.

90158140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 90158140 is about 9495.1640322851. The cubic root of 90158140 is about 448.4027986073.

The spelling of 90158140 in words is "ninety million, one hundred fifty-eight thousand, one hundred forty".