2578390 has 32 divisors (see below), whose sum is σ = 5093280. Its totient is φ = 935424.

The previous prime is 2578351. The next prime is 2578391. The reversal of 2578390 is 938752.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4669 + ... + 5191.

It is an arithmetic number, because the mean of its divisors is an integer number (159165).

2^2578390 is an apocalyptic number.

2578390 is a deficient number, since it is larger than the sum of its proper divisors (2514890).

2578390 is a wasteful number, since it uses less digits than its factorization.

2578390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 2578390 is about 1605.7365911008. The cubic root of 2578390 is about 137.1248617468.

The spelling of 2578390 in words is "two million, five hundred seventy-eight thousand, three hundred ninety".