139291680 has 384 divisors, whose sum is σ = 529514496. Its totient is φ = 30412800.

The previous prime is 139291673. The next prime is 139291721. The reversal of 139291680 is 86192931.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3764622 + ... + 3764658.

It is an arithmetic number, because the mean of its divisors is an integer number (1378944).

Almost surely, 2^139291680 is an apocalyptic number.

139291680 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 139291680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264757248).

139291680 is an abundant number, since it is smaller than the sum of its proper divisors (390222816).

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

139291680 is a wasteful number, since it uses less digits than its factorization.

139291680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 139291680 is about 11802.1896273531. The cubic root of 139291680 is about 518.3722274026.

The spelling of 139291680 in words is "one hundred thirty-nine million, two hundred ninety-one thousand, six hundred eighty".