1978936 has 16 divisors (see below), whose sum is σ = 3929040. Its totient is φ = 931200.

The previous prime is 1978927. The next prime is 1978981. The reversal of 1978936 is 6398791.

It is a junction number, because it is equal to n+sod(n) for n = 1978892 and 1978901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7140 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (245565).

2^1978936 is an apocalyptic number.

It is an amenable number.

1978936 is a deficient number, since it is larger than the sum of its proper divisors (1950104).

1978936 is a wasteful number, since it uses less digits than its factorization.

1978936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14574 (or 14570 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 1978936 is about 1406.7466012044. The cubic root of 1978936 is about 125.5482267312.

The spelling of 1978936 in words is "one million, nine hundred seventy-eight thousand, nine hundred thirty-six".