139563840 has 224 divisors, whose sum is σ = 488509056. Its totient is φ = 33546240.

The previous prime is 139563817. The next prime is 139563841. The reversal of 139563840 is 48365931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139563841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661335 + ... + 661545.

It is an arithmetic number, because the mean of its divisors is an integer number (2180844).

Almost surely, 2^139563840 is an apocalyptic number.

139563840 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 139563840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244254528).

139563840 is an abundant number, since it is smaller than the sum of its proper divisors (348945216).

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

139563840 is a wasteful number, since it uses less digits than its factorization.

139563840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 139563840 is about 11813.7140645946. The cubic root of 139563840 is about 518.7096210889.

The spelling of 139563840 in words is "one hundred thirty-nine million, five hundred sixty-three thousand, eight hundred forty".