139273680 has 240 divisors, whose sum is σ = 541465344. Its totient is φ = 29352960.

The previous prime is 139273663. The next prime is 139273699. The reversal of 139273680 is 86372931.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152425 + ... + 153335.

Almost surely, 2^139273680 is an apocalyptic number.

139273680 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 139273680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270732672).

139273680 is an abundant number, since it is smaller than the sum of its proper divisors (402191664).

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

139273680 is a wasteful number, since it uses less digits than its factorization.

139273680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 139273680 is about 11801.4270323550. The cubic root of 139273680 is about 518.3498975165.

The spelling of 139273680 in words is "one hundred thirty-nine million, two hundred seventy-three thousand, six hundred eighty".