1278583420 has 24 divisors (see below), whose sum is σ = 2694944448. Its totient is φ = 509544000.

The previous prime is 1278583417. The next prime is 1278583421. The reversal of 1278583420 is 243858721.

It is a happy number.

1278583420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278583421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112531 + ... + 123370.

It is an arithmetic number, because the mean of its divisors is an integer number (112289352).

Almost surely, 2^1278583420 is an apocalyptic number.

1278583420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278583420 is an abundant number, since it is smaller than the sum of its proper divisors (1416361028).

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

1278583420 is a wasteful number, since it uses less digits than its factorization.

1278583420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236181 (or 236179 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1278583420 is about 35757.2848521808. The cubic root of 1278583420 is about 1085.3663581927.

The spelling of 1278583420 in words is "one billion, two hundred seventy-eight million, five hundred eighty-three thousand, four hundred twenty".