139691040 has 288 divisors, whose sum is σ = 501318720. Its totient is φ = 32587776.

The previous prime is 139691017. The next prime is 139691081. The reversal of 139691040 is 40196931.

It is a junction number, because it is equal to n+sod(n) for n = 139690992 and 139691010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2635654 + ... + 2635706.

It is an arithmetic number, because the mean of its divisors is an integer number (1740690).

Almost surely, 2^139691040 is an apocalyptic number.

139691040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139691040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250659360).

139691040 is an abundant number, since it is smaller than the sum of its proper divisors (361627680).

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

139691040 is a wasteful number, since it uses less digits than its factorization.

139691040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 139691040 is about 11819.0964121628. The cubic root of 139691040 is about 518.8671590993.

The spelling of 139691040 in words is "one hundred thirty-nine million, six hundred ninety-one thousand, forty".