2578620 has 48 divisors (see below), whose sum is σ = 7878528. Its totient is φ = 624960.

The previous prime is 2578603. The next prime is 2578621. The reversal of 2578620 is 268752.

It is a super-2 number, since 2×2578620² = 13298562208800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578621) 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, 1294 + ... + 2613.

It is an arithmetic number, because the mean of its divisors is an integer number (164136).

2^2578620 is an apocalyptic number.

2578620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578620 is an abundant number, since it is smaller than the sum of its proper divisors (5299908).

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

2578620 is a wasteful number, since it uses less digits than its factorization.

2578620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2578620 is about 1605.8082077259. The cubic root of 2578620 is about 137.1289389397.

The spelling of 2578620 in words is "two million, five hundred seventy-eight thousand, six hundred twenty".