139027680 has 288 divisors, whose sum is σ = 529296768. Its totient is φ = 32947200.

The previous prime is 139027657. The next prime is 139027687. The reversal of 139027680 is 86720931.

It is a Cunningham number, because it is equal to 11791²-1.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139027687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1061215 + ... + 1061345.

It is an arithmetic number, because the mean of its divisors is an integer number (1837836).

Almost surely, 2^139027680 is an apocalyptic number.

139027680 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 139027680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264648384).

139027680 is an abundant number, since it is smaller than the sum of its proper divisors (390269088).

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

139027680 is a wasteful number, since it uses less digits than its factorization.

139027680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 139027680 is about 11790.9999575948. Note that the first 4 decimals coincide. The cubic root of 139027680 is about 518.0445293980.

The spelling of 139027680 in words is "one hundred thirty-nine million, twenty-seven thousand, six hundred eighty".