139855800 has 288 divisors, whose sum is σ = 519073920. Its totient is φ = 31046400.

The previous prime is 139855799. The next prime is 139855813. The reversal of 139855800 is 8558931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1969765 + ... + 1969835.

It is an arithmetic number, because the mean of its divisors is an integer number (1802340).

Almost surely, 2^139855800 is an apocalyptic number.

139855800 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 139855800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259536960).

139855800 is an abundant number, since it is smaller than the sum of its proper divisors (379218120).

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

139855800 is a wasteful number, since it uses less digits than its factorization.

139855800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 139855800 is about 11826.0644341218. The cubic root of 139855800 is about 519.0710733113.

The spelling of 139855800 in words is "one hundred thirty-nine million, eight hundred fifty-five thousand, eight hundred".