139409446 has 32 divisors (see below), whose sum is σ = 233049600. Its totient is φ = 62013600.

The previous prime is 139409443. The next prime is 139409447. The reversal of 139409446 is 644904931.

139409446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139409399 and 139409408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139409443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399280 + ... + 399628.

It is an arithmetic number, because the mean of its divisors is an integer number (7282800).

Almost surely, 2^139409446 is an apocalyptic number.

139409446 is a deficient number, since it is larger than the sum of its proper divisors (93640154).

139409446 is a wasteful number, since it uses less digits than its factorization.

139409446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 139409446 is about 11807.1777322102. The cubic root of 139409446 is about 518.5182744782.

The spelling of 139409446 in words is "one hundred thirty-nine million, four hundred nine thousand, four hundred forty-six".