1978896 has 20 divisors (see below), whose sum is σ = 5112272. Its totient is φ = 659616.

The previous prime is 1978891. The next prime is 1978909. The reversal of 1978896 is 6988791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 41227 = 1978896 / (1 + 9 + 7 + 8 + 8 + 9 + 6).

It is not an unprimeable number, because it can be changed into a prime (1978891) 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, 20566 + ... + 20661.

2^1978896 is an apocalyptic number.

1978896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1978896 is an abundant number, since it is smaller than the sum of its proper divisors (3133376).

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

1978896 is a wasteful number, since it uses less digits than its factorization.

1978896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41238 (or 41232 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 1978896 is about 1406.7323839309. The cubic root of 1978896 is about 125.5473808283.

The spelling of 1978896 in words is "one million, nine hundred seventy-eight thousand, eight hundred ninety-six".