139924040 has 16 divisors (see below), whose sum is σ = 314829180. Its totient is φ = 55969600.

The previous prime is 139924033. The next prime is 139924061. The reversal of 139924040 is 40429931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 134606404 + 5317636 = 11602^2 + 2306^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139923988 and 139924006.

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, 1749011 + ... + 1749090.

Almost surely, 2^139924040 is an apocalyptic number.

139924040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139924040 is an abundant number, since it is smaller than the sum of its proper divisors (174905140).

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

139924040 is a wasteful number, since it uses less digits than its factorization.

139924040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498112 (or 3498108 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 139924040 is about 11828.9492348222. The cubic root of 139924040 is about 519.1554832309.

The spelling of 139924040 in words is "one hundred thirty-nine million, nine hundred twenty-four thousand, forty".