2690649 has 36 divisors (see below), whose sum is σ = 4424940. Its totient is φ = 1572480.

The previous prime is 2690629. The next prime is 2690657. The reversal of 2690649 is 9460962.

2690649 is a `hidden beast` number, since 2 + 6 + 9 + 0 + 649 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1065024 + 1625625 = 1032^2 + 1275^2 .

It is not a de Polignac number, because 2690649 - 2⁹ = 2690137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2690629) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44079 + ... + 44139.

It is an arithmetic number, because the mean of its divisors is an integer number (122915).

2^2690649 is an apocalyptic number.

2690649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2690649 is a deficient number, since it is larger than the sum of its proper divisors (1734291).

2690649 is a wasteful number, since it uses less digits than its factorization.

2690649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2690649 is about 1640.3197858954. The cubic root of 2690649 is about 139.0867253760.

The spelling of 2690649 in words is "two million, six hundred ninety thousand, six hundred forty-nine".