90858740 has 144 divisors (see below), whose sum is σ = 241315200. Its totient is φ = 28562688.

The previous prime is 90858739. The next prime is 90858749. The reversal of 90858740 is 4785809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90858749) 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, 653591 + ... + 653729.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 2^90858740 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 90858740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120657600).

90858740 is an abundant number, since it is smaller than the sum of its proper divisors (150456460).

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

90858740 is a wasteful number, since it uses less digits than its factorization.

90858740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 90858740 is about 9531.9851027999. The cubic root of 90858740 is about 449.5612843589.

The spelling of 90858740 in words is "ninety million, eight hundred fifty-eight thousand, seven hundred forty".