139902344 has 8 divisors (see below), whose sum is σ = 262316910. Its totient is φ = 69951168.

The previous prime is 139902317. The next prime is 139902379. The reversal of 139902344 is 443209931.

It can be written as a sum of positive squares in only one way, i.e., 81685444 + 58216900 = 9038^2 + 7630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8743889 + ... + 8743904.

Almost surely, 2^139902344 is an apocalyptic number.

It is an amenable number.

139902344 is a deficient number, since it is larger than the sum of its proper divisors (122414566).

139902344 is a wasteful number, since it uses less digits than its factorization.

139902344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17487799 (or 17487795 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 139902344 is about 11828.0321271123. The cubic root of 139902344 is about 519.1286491964.

The spelling of 139902344 in words is "one hundred thirty-nine million, nine hundred two thousand, three hundred forty-four".