139398630 has 256 divisors, whose sum is σ = 442368000. Its totient is φ = 27941760.

The previous prime is 139398613. The next prime is 139398643. The reversal of 139398630 is 36893931.

139398630 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 127 ways as a sum of consecutive naturals, for example, 4496715 + ... + 4496745.

It is an arithmetic number, because the mean of its divisors is an integer number (1728000).

Almost surely, 2^139398630 is an apocalyptic number.

139398630 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 139398630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221184000).

139398630 is an abundant number, since it is smaller than the sum of its proper divisors (302969370).

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

139398630 is a wasteful number, since it uses less digits than its factorization.

139398630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 139398630 is about 11806.7196968506. The cubic root of 139398630 is about 518.5048644861.

The spelling of 139398630 in words is "one hundred thirty-nine million, three hundred ninety-eight thousand, six hundred thirty".