9138280 has 16 divisors (see below), whose sum is σ = 20561220. Its totient is φ = 3655296.

The previous prime is 9138271. The next prime is 9138281. The reversal of 9138280 is 828319.

It can be written as a sum of positive squares in 2 ways, for example, as 8726116 + 412164 = 2954^2 + 642^2 .

It is a super-2 number, since 2×9138280² = 167016322716800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9138281) 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, 114189 + ... + 114268.

Almost surely, 2^9138280 is an apocalyptic number.

It is an amenable number.

9138280 is an abundant number, since it is smaller than the sum of its proper divisors (11422940).

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

9138280 is a wasteful number, since it uses less digits than its factorization.

9138280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228468 (or 228464 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 9138280 is about 3022.9588154654. The cubic root of 9138280 is about 209.0682835116.

It can be divided in two parts, 91 and 38280, that multiplied together give a triangular number (3483480 = T₂₆₃₉).

The spelling of 9138280 in words is "nine million, one hundred thirty-eight thousand, two hundred eighty".