1978295 has 8 divisors (see below), whose sum is σ = 2589840. Its totient is φ = 1438720.

The previous prime is 1978289. The next prime is 1978297. The reversal of 1978295 is 5928791.

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

It is a de Polignac number, because none of the positive numbers 2^k-1978295 is a prime.

It is a super-2 number, since 2×1978295² = 7827302214050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 9² + 7⁵ + 8 + 2¹³ + 9² + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17930 + ... + 18039.

It is an arithmetic number, because the mean of its divisors is an integer number (323730).

2^1978295 is an apocalyptic number.

1978295 is a deficient number, since it is larger than the sum of its proper divisors (611545).

1978295 is a wasteful number, since it uses less digits than its factorization.

1978295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35985.

The product of its digits is 45360, while the sum is 41.

The square root of 1978295 is about 1406.5187520968. The cubic root of 1978295 is about 125.5346697652.

The spelling of 1978295 in words is "one million, nine hundred seventy-eight thousand, two hundred ninety-five".