139709850 has 192 divisors, whose sum is σ = 428544000. Its totient is φ = 29410560.

The previous prime is 139709827. The next prime is 139709879. The reversal of 139709850 is 58907931.

It is a happy number.

139709850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 937576 + ... + 937724.

It is an arithmetic number, because the mean of its divisors is an integer number (2232000).

Almost surely, 2^139709850 is an apocalyptic number.

139709850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139709850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214272000).

139709850 is an abundant number, since it is smaller than the sum of its proper divisors (288834150).

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

139709850 is a wasteful number, since it uses less digits than its factorization.

139709850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 139709850 is about 11819.8921314875. The cubic root of 139709850 is about 518.8904472864.

The spelling of 139709850 in words is "one hundred thirty-nine million, seven hundred nine thousand, eight hundred fifty".