2905864 has 16 divisors (see below), whose sum is σ = 5867820. Its totient is φ = 1341120.

The previous prime is 2905853. The next prime is 2905867. The reversal of 2905864 is 4685092.

2905864 = T₅₂ + T₅₃ + ... + T₂₅₉.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2788900 + 116964 = 1670^2 + 342^2 .

It is not an unprimeable number, because it can be changed into a prime (2905867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13867 + ... + 14074.

2^2905864 is an apocalyptic number.

It is an amenable number.

2905864 is an abundant number, since it is smaller than the sum of its proper divisors (2961956).

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

2905864 is a wasteful number, since it uses less digits than its factorization.

2905864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27960 (or 27956 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2905864 is about 1704.6594967911. The cubic root of 2905864 is about 142.7003685872.

It can be divided in two parts, 2905 and 864, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 2905864 in words is "two million, nine hundred five thousand, eight hundred sixty-four".