139705340 has 24 divisors (see below), whose sum is σ = 301312032. Its totient is φ = 54371520.

The previous prime is 139705331. The next prime is 139705361. The reversal of 139705340 is 43507931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 139705297 and 139705306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93656 + ... + 95135.

It is an arithmetic number, because the mean of its divisors is an integer number (12554668).

Almost surely, 2^139705340 is an apocalyptic number.

139705340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139705340 is an abundant number, since it is smaller than the sum of its proper divisors (161606692).

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

139705340 is a wasteful number, since it uses less digits than its factorization.

139705340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188837 (or 188835 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 139705340 is about 11819.7013498650. The cubic root of 139705340 is about 518.8848637595.

The spelling of 139705340 in words is "one hundred thirty-nine million, seven hundred five thousand, three hundred forty".