139780408 has 16 divisors (see below), whose sum is σ = 262237680. Its totient is φ = 69850368.

The previous prime is 139780393. The next prime is 139780429. The reversal of 139780408 is 804087931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14341 + ... + 22027.

It is an arithmetic number, because the mean of its divisors is an integer number (16389855).

Almost surely, 2^139780408 is an apocalyptic number.

It is an amenable number.

139780408 is a deficient number, since it is larger than the sum of its proper divisors (122457272).

139780408 is a wasteful number, since it uses less digits than its factorization.

139780408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9966 (or 9962 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 139780408 is about 11822.8764689478. The cubic root of 139780408 is about 518.9777847469.

The spelling of 139780408 in words is "one hundred thirty-nine million, seven hundred eighty thousand, four hundred eight".