1878920 has 32 divisors (see below), whose sum is σ = 4276800. Its totient is φ = 742848.

The previous prime is 1878913. The next prime is 1878931. The reversal of 1878920 is 298781.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4061 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (133650).

2^1878920 is an apocalyptic number.

1878920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1878920 is an abundant number, since it is smaller than the sum of its proper divisors (2397880).

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

1878920 is a wasteful number, since it uses less digits than its factorization.

1878920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1878920 is about 1370.7370280254. The cubic root of 1878920 is about 123.3964776893.

The spelling of 1878920 in words is "one million, eight hundred seventy-eight thousand, nine hundred twenty".