2646390 has 32 divisors (see below), whose sum is σ = 6726240. Its totient is φ = 664064.

The previous prime is 2646361. The next prime is 2646409. The reversal of 2646390 is 936462.

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

It is a d-powerful number, because it can be written as 2²¹ + 6² + 4⁷ + 6⁴ + 3¹² + 9² + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085 + ... + 3104.

It is an arithmetic number, because the mean of its divisors is an integer number (210195).

2^2646390 is an apocalyptic number.

2646390 is an abundant number, since it is smaller than the sum of its proper divisors (4079850).

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

2646390 is a wasteful number, since it uses less digits than its factorization.

2646390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2646390 is about 1626.7728790461. The cubic root of 2646390 is about 138.3198838556.

The spelling of 2646390 in words is "two million, six hundred forty-six thousand, three hundred ninety".