1378870920 has 96 divisors (see below), whose sum is σ = 5121529920. Its totient is φ = 315169920.

The previous prime is 1378870919. The next prime is 1378870931. The reversal of 1378870920 is 290788731.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271066 + ... + 276105.

It is an arithmetic number, because the mean of its divisors is an integer number (53349270).

Almost surely, 2^1378870920 is an apocalyptic number.

1378870920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378870920 is an abundant number, since it is smaller than the sum of its proper divisors (3742659000).

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

1378870920 is a wasteful number, since it uses less digits than its factorization.

1378870920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547195 (or 547188 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1378870920 is about 37133.1512263638. The cubic root of 1378870920 is about 1113.0325644408.

The spelling of 1378870920 in words is "one billion, three hundred seventy-eight million, eight hundred seventy thousand, nine hundred twenty".