1384639680 has 56 divisors (see below), whose sum is σ = 4396234032. Its totient is φ = 369236992.

The previous prime is 1384639673. The next prime is 1384639699. The reversal of 1384639680 is 869364831.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 720207 + ... + 722126.

Almost surely, 2^1384639680 is an apocalyptic number.

1384639680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1384639680 is an abundant number, since it is smaller than the sum of its proper divisors (3011594352).

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

1384639680 is a wasteful number, since it uses less digits than its factorization.

1384639680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442353 (or 1442343 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1384639680 is about 37210.7468347519. The cubic root of 1384639680 is about 1114.5825969526.

The spelling of 1384639680 in words is "one billion, three hundred eighty-four million, six hundred thirty-nine thousand, six hundred eighty".