90770740 has 12 divisors (see below), whose sum is σ = 190618596. Its totient is φ = 36308288.

The previous prime is 90770737. The next prime is 90770741. The reversal of 90770740 is 4707709.

It can be written as a sum of positive squares in 2 ways, for example, as 16224784 + 74545956 = 4028^2 + 8634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90770696 and 90770705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90770741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269249 + ... + 2269288.

It is an arithmetic number, because the mean of its divisors is an integer number (15884883).

Almost surely, 2^90770740 is an apocalyptic number.

It is an amenable number.

90770740 is an abundant number, since it is smaller than the sum of its proper divisors (99847856).

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

90770740 is a wasteful number, since it uses less digits than its factorization.

90770740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538546 (or 4538544 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 90770740 is about 9527.3679471300. The cubic root of 90770740 is about 449.4160986486.

The spelling of 90770740 in words is "ninety million, seven hundred seventy thousand, seven hundred forty".