2138280 has 64 divisors (see below), whose sum is σ = 6514560. Its totient is φ = 561408.

The previous prime is 2138263. The next prime is 2138291. The reversal of 2138280 is 828312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2138280.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12274 + ... + 12446.

It is an arithmetic number, because the mean of its divisors is an integer number (101790).

2^2138280 is an apocalyptic number.

2138280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3257280).

2138280 is an abundant number, since it is smaller than the sum of its proper divisors (4376280).

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

2138280 is a wasteful number, since it uses less digits than its factorization.

2138280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2138280 is about 1462.2858817618. The cubic root of 2138280 is about 128.8313401868.

The spelling of 2138280 in words is "two million, one hundred thirty-eight thousand, two hundred eighty".