2651890 has 16 divisors (see below), whose sum is σ = 4791960. Its totient is φ = 1056640.

The previous prime is 2651867. The next prime is 2651893. The reversal of 2651890 is 981562.

It can be written as a sum of positive squares in 4 ways, for example, as 2241009 + 410881 = 1497^2 + 641^2 .

It is not an unprimeable number, because it can be changed into a prime (2651893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4830 + ... + 5350.

2^2651890 is an apocalyptic number.

2651890 is a deficient number, since it is larger than the sum of its proper divisors (2140070).

2651890 is a wasteful number, since it uses less digits than its factorization.

2651890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2651890 is about 1628.4624650264. The cubic root of 2651890 is about 138.4156410870.

The spelling of 2651890 in words is "two million, six hundred fifty-one thousand, eight hundred ninety".