139602040 has 16 divisors (see below), whose sum is σ = 314104680. Its totient is φ = 55840800.

The previous prime is 139602017. The next prime is 139602059. The reversal of 139602040 is 40206931.

It is a junction number, because it is equal to n+sod(n) for n = 139601996 and 139602014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744986 + ... + 1745065.

Almost surely, 2^139602040 is an apocalyptic number.

139602040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139602040 is an abundant number, since it is smaller than the sum of its proper divisors (174502640).

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

139602040 is a wasteful number, since it uses less digits than its factorization.

139602040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490062 (or 3490058 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 139602040 is about 11815.3307190277. The cubic root of 139602040 is about 518.7569420855.

Adding to 139602040 its reverse (40206931), we get a palindrome (179808971).

The spelling of 139602040 in words is "one hundred thirty-nine million, six hundred two thousand, forty".