1878403820 has 12 divisors (see below), whose sum is σ = 3944648064. Its totient is φ = 751361520.

The previous prime is 1878403817. The next prime is 1878403843. The reversal of 1878403820 is 283048781.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 46960076 + ... + 46960115.

It is an arithmetic number, because the mean of its divisors is an integer number (328720672).

Almost surely, 2^1878403820 is an apocalyptic number.

1878403820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1878403820 is an abundant number, since it is smaller than the sum of its proper divisors (2066244244).

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

1878403820 is a wasteful number, since it uses less digits than its factorization.

1878403820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93920200 (or 93920198 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 1878403820 is about 43340.5562954607. The cubic root of 1878403820 is about 1233.8517675977.

The spelling of 1878403820 in words is "one billion, eight hundred seventy-eight million, four hundred three thousand, eight hundred twenty".