90897408 has 132 divisors (see below), whose sum is σ = 300172080. Its totient is φ = 25952256.

The previous prime is 90897379. The next prime is 90897409. The reversal of 90897408 is 80479809.

It is a super-2 number, since 2×90897408² = 16524677562236928, which contains 22 as substring.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63808 + ... + 65216.

Almost surely, 2^90897408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90897408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150086040).

90897408 is an abundant number, since it is smaller than the sum of its proper divisors (209274672).

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

90897408 is a wasteful number, since it uses less digits than its factorization.

90897408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 90897408 is about 9534.0132158499. The cubic root of 90897408 is about 449.6250506341.

The spelling of 90897408 in words is "ninety million, eight hundred ninety-seven thousand, four hundred eight".