2445890 has 8 divisors (see below), whose sum is σ = 4402620. Its totient is φ = 978352.

The previous prime is 2445887. The next prime is 2445899. The reversal of 2445890 is 985442.

It can be written as a sum of positive squares in 2 ways, for example, as 2362369 + 83521 = 1537^2 + 289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2445899) 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, 122285 + ... + 122304.

2^2445890 is an apocalyptic number.

2445890 is a deficient number, since it is larger than the sum of its proper divisors (1956730).

2445890 is a wasteful number, since it uses less digits than its factorization.

2445890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244596.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2445890 is about 1563.9341418359. The cubic root of 2445890 is about 134.7345492592.

It can be divided in two parts, 2 and 445890, that multiplied together give a triangular number (891780 = T₁₃₃₅).

The spelling of 2445890 in words is "two million, four hundred forty-five thousand, eight hundred ninety".