90521408 has 14 divisors (see below), whose sum is σ = 179628546. Its totient is φ = 45260672.

The previous prime is 90521401. The next prime is 90521411. The reversal of 90521408 is 80412509.

It can be written as a sum of positive squares in only one way, i.e., 90478144 + 43264 = 9512^2 + 208^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90521401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 707135 + ... + 707262.

Almost surely, 2^90521408 is an apocalyptic number.

It is an amenable number.

90521408 is a deficient number, since it is larger than the sum of its proper divisors (89107138).

90521408 is a wasteful number, since it uses less digits than its factorization.

90521408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414409 (or 1414399 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 90521408 is about 9514.2739081866. The cubic root of 90521408 is about 449.0042310899.

The spelling of 90521408 in words is "ninety million, five hundred twenty-one thousand, four hundred eight".