90840771 has 40 divisors (see below), whose sum is σ = 156397824. Its totient is φ = 51470640.

The previous prime is 90840749. The next prime is 90840779. The reversal of 90840771 is 17704809.

It is not a de Polignac number, because 90840771 - 2⁷ = 90840643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90840779) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 73666 + ... + 74888.

Almost surely, 2^90840771 is an apocalyptic number.

90840771 is a deficient number, since it is larger than the sum of its proper divisors (65557053).

90840771 is a wasteful number, since it uses less digits than its factorization.

90840771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 90840771 is about 9531.0424928231. The cubic root of 90840771 is about 449.5316460459.

The spelling of 90840771 in words is "ninety million, eight hundred forty thousand, seven hundred seventy-one".