2550990 has 64 divisors (see below), whose sum is σ = 6838272. Its totient is φ = 604800.

The previous prime is 2550973. The next prime is 2550991. The reversal of 2550990 is 990552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2550991) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 11985 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (106848).

2^2550990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2550990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3419136).

2550990 is an abundant number, since it is smaller than the sum of its proper divisors (4287282).

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

2550990 is a wasteful number, since it uses less digits than its factorization.

2550990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 2550990 is about 1597.1818932107. The cubic root of 2550990 is about 136.6373987164.

It can be divided in two parts, 25 and 50990, that added together give a palindrome (51015).

The spelling of 2550990 in words is "two million, five hundred fifty thousand, nine hundred ninety".