2045378 has 4 divisors (see below), whose sum is σ = 3068070. Its totient is φ = 1022688.

The previous prime is 2045377. The next prime is 2045437. The reversal of 2045378 is 8735402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2024929 + 20449 = 1423^2 + 143^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2045378.

It is not an unprimeable number, because it can be changed into a prime (2045371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511343 + ... + 511346.

2^2045378 is an apocalyptic number.

2045378 is a deficient number, since it is larger than the sum of its proper divisors (1022692).

2045378 is a wasteful number, since it uses less digits than its factorization.

2045378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022691.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 2045378 is about 1430.1671231014. The cubic root of 2045378 is about 126.9378661489.

The spelling of 2045378 in words is "two million, forty-five thousand, three hundred seventy-eight".