2620690 has 8 divisors (see below), whose sum is σ = 4717260. Its totient is φ = 1048272.

The previous prime is 2620663. The next prime is 2620741. The reversal of 2620690 is 960262.

It can be written as a sum of positive squares in 2 ways, for example, as 2493241 + 127449 = 1579^2 + 357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2620690² = 13736032152200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131025 + ... + 131044.

2^2620690 is an apocalyptic number.

2620690 is a deficient number, since it is larger than the sum of its proper divisors (2096570).

2620690 is a wasteful number, since it uses less digits than its factorization.

2620690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262076.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2620690 is about 1618.8545333043. The cubic root of 2620690 is about 137.8706692820.

The spelling of 2620690 in words is "two million, six hundred twenty thousand, six hundred ninety".