90020080 has 40 divisors (see below), whose sum is σ = 209919600. Its totient is φ = 35900928.

The previous prime is 90020071. The next prime is 90020101. The reversal of 90020080 is 8002009.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×90020080² = 16207229606412800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28836 + ... + 31804.

It is an arithmetic number, because the mean of its divisors is an integer number (5247990).

Almost surely, 2^90020080 is an apocalyptic number.

It is an amenable number.

90020080 is an abundant number, since it is smaller than the sum of its proper divisors (119899520).

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

90020080 is a wasteful number, since it uses less digits than its factorization.

90020080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361 (or 3355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 90020080 is about 9487.8912304052. The cubic root of 90020080 is about 448.1738005505.

Adding to 90020080 its reverse (8002009), we get a palindrome (98022089).

The spelling of 90020080 in words is "ninety million, twenty thousand, eighty".