139652840 has 32 divisors (see below), whose sum is σ = 317467080. Its totient is φ = 55283712.

The previous prime is 139652819. The next prime is 139652873. The reversal of 139652840 is 48256931.

It is a happy number.

139652840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 130005604 + 9647236 = 11402^2 + 3106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139652794 and 139652803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14117 + ... + 21876.

Almost surely, 2^139652840 is an apocalyptic number.

139652840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139652840 is an abundant number, since it is smaller than the sum of its proper divisors (177814240).

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

139652840 is a wasteful number, since it uses less digits than its factorization.

139652840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36101 (or 36097 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 139652840 is about 11817.4802728839. The cubic root of 139652840 is about 518.8198582071.

The spelling of 139652840 in words is "one hundred thirty-nine million, six hundred fifty-two thousand, eight hundred forty".