90387722 has 8 divisors (see below), whose sum is σ = 140256900. Its totient is φ = 43635424.

The previous prime is 90387719. The next prime is 90387727. The reversal of 90387722 is 22778309.

It can be written as a sum of positive squares in 2 ways, for example, as 81018001 + 9369721 = 9001^2 + 3061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (90387727) 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, 779147 + ... + 779262.

Almost surely, 2^90387722 is an apocalyptic number.

90387722 is a deficient number, since it is larger than the sum of its proper divisors (49869178).

90387722 is a wasteful number, since it uses less digits than its factorization.

90387722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558440.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 90387722 is about 9507.2457631009. The cubic root of 90387722 is about 448.7830857841.

The spelling of 90387722 in words is "ninety million, three hundred eighty-seven thousand, seven hundred twenty-two".