139405340 has 12 divisors (see below), whose sum is σ = 292751256. Its totient is φ = 55762128.

The previous prime is 139405333. The next prime is 139405373. The reversal of 139405340 is 43504931.

139405340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 3485114 + ... + 3485153.

It is an arithmetic number, because the mean of its divisors is an integer number (24395938).

Almost surely, 2^139405340 is an apocalyptic number.

139405340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139405340 is an abundant number, since it is smaller than the sum of its proper divisors (153345916).

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

139405340 is a wasteful number, since it uses less digits than its factorization.

139405340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970276 (or 6970274 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 139405340 is about 11807.0038536455. The cubic root of 139405340 is about 518.5131838214.

The spelling of 139405340 in words is "one hundred thirty-nine million, four hundred five thousand, three hundred forty".