1939878 has 24 divisors (see below), whose sum is σ = 4294368. Its totient is φ = 632592.

The previous prime is 1939867. The next prime is 1939879. The reversal of 1939878 is 8789391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301 + ... + 1992.

It is an arithmetic number, because the mean of its divisors is an integer number (178932).

2^1939878 is an apocalyptic number.

1939878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1939878 is an abundant number, since it is smaller than the sum of its proper divisors (2354490).

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

1939878 is a wasteful number, since it uses less digits than its factorization.

1939878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348 (or 2345 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1939878 is about 1392.7950315822. The cubic root of 1939878 is about 124.7167560008.

The spelling of 1939878 in words is "one million, nine hundred thirty-nine thousand, eight hundred seventy-eight".