90741640 has 64 divisors (see below), whose sum is σ = 223845120. Its totient is φ = 32832000.

The previous prime is 90741593. The next prime is 90741719. The reversal of 90741640 is 4614709.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118860 + ... + 119620.

It is an arithmetic number, because the mean of its divisors is an integer number (3497580).

Almost surely, 2^90741640 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 90741640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111922560).

90741640 is an abundant number, since it is smaller than the sum of its proper divisors (133103480).

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

90741640 is a wasteful number, since it uses less digits than its factorization.

90741640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 90741640 is about 9525.8406453184. The cubic root of 90741640 is about 449.3680677293.

The spelling of 90741640 in words is "ninety million, seven hundred forty-one thousand, six hundred forty".