139248436 has 12 divisors (see below), whose sum is σ = 246621312. Its totient is φ = 68785208.

The previous prime is 139248413. The next prime is 139248443. The reversal of 139248436 is 634842931.

It is a happy number.

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, 209380 + ... + 210043.

It is an arithmetic number, because the mean of its divisors is an integer number (20551776).

Almost surely, 2^139248436 is an apocalyptic number.

It is an amenable number.

139248436 is a deficient number, since it is larger than the sum of its proper divisors (107372876).

139248436 is a wasteful number, since it uses less digits than its factorization.

139248436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419510 (or 419508 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 139248436 is about 11800.3574522130. The cubic root of 139248436 is about 518.3185778503.

The spelling of 139248436 in words is "one hundred thirty-nine million, two hundred forty-eight thousand, four hundred thirty-six".