2278389819 has 4 divisors (see below), whose sum is σ = 3037853096. Its totient is φ = 1518926544.

The previous prime is 2278389797. The next prime is 2278389823. The reversal of 2278389819 is 9189838722.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2278389819 - 2⁸ = 2278389563 is a prime.

It is a super-2 number, since 2×2278389819² = 10382120334645705522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278389899) 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, 379731634 + ... + 379731639.

It is an arithmetic number, because the mean of its divisors is an integer number (759463274).

Almost surely, 2^2278389819 is an apocalyptic number.

2278389819 is a deficient number, since it is larger than the sum of its proper divisors (759463277).

2278389819 is an equidigital number, since it uses as much as digits as its factorization.

2278389819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759463276.

The product of its digits is 3483648, while the sum is 57.

The square root of 2278389819 is about 47732.4818022277. The cubic root of 2278389819 is about 1315.8589652708.

The spelling of 2278389819 in words is "two billion, two hundred seventy-eight million, three hundred eighty-nine thousand, eight hundred nineteen".