139978384 has 80 divisors (see below), whose sum is σ = 336867328. Its totient is φ = 54867456.

The previous prime is 139978337. The next prime is 139978409. The reversal of 139978384 is 483879931.

139978384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184534 + ... + 185290.

Almost surely, 2^139978384 is an apocalyptic number.

139978384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139978384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168433664).

139978384 is an abundant number, since it is smaller than the sum of its proper divisors (196888944).

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

139978384 is a wasteful number, since it uses less digits than its factorization.

139978384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 906 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 139978384 is about 11831.2460882191. The cubic root of 139978384 is about 519.2226847733. Note that the first 3 decimals are identical.

The spelling of 139978384 in words is "one hundred thirty-nine million, nine hundred seventy-eight thousand, three hundred eighty-four".