139535406 has 32 divisors (see below), whose sum is σ = 314714880. Its totient is φ = 45816408.

The previous prime is 139535381. The next prime is 139535419. The reversal of 139535406 is 604535931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15666 + ... + 22901.

It is an arithmetic number, because the mean of its divisors is an integer number (9834840).

Almost surely, 2^139535406 is an apocalyptic number.

139535406 is an abundant number, since it is smaller than the sum of its proper divisors (175179474).

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

139535406 is a wasteful number, since it uses less digits than its factorization.

139535406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38645 (or 38639 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 139535406 is about 11812.5105714238. The cubic root of 139535406 is about 518.6743923097.

The spelling of 139535406 in words is "one hundred thirty-nine million, five hundred thirty-five thousand, four hundred six".