90999896 has 32 divisors (see below), whose sum is σ = 187669440. Its totient is φ = 41104128.

The previous prime is 90999859. The next prime is 90999899. The reversal of 90999896 is 69899909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90999899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4421 + ... + 14196.

It is an arithmetic number, because the mean of its divisors is an integer number (5864670).

Almost surely, 2^90999896 is an apocalyptic number.

It is an amenable number.

90999896 is an abundant number, since it is smaller than the sum of its proper divisors (96669544).

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

90999896 is a wasteful number, since it uses less digits than its factorization.

90999896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18683 (or 18679 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 59.

The square root of 90999896 is about 9539.3865630867. The cubic root of 90999896 is about 449.7939731773.

The spelling of 90999896 in words is "ninety million, nine hundred ninety-nine thousand, eight hundred ninety-six".