139197630 has 128 divisors (see below), whose sum is σ = 398877696. Its totient is φ = 30643200.

The previous prime is 139197577. The next prime is 139197647. The reversal of 139197630 is 36791931.

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 (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 304362 + ... + 304818.

It is an arithmetic number, because the mean of its divisors is an integer number (3116232).

Almost surely, 2^139197630 is an apocalyptic number.

139197630 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 139197630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199438848).

139197630 is an abundant number, since it is smaller than the sum of its proper divisors (259680066).

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

139197630 is a wasteful number, since it uses less digits than its factorization.

139197630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 139197630 is about 11798.2045244181. The cubic root of 139197630 is about 518.2555325055.

The spelling of 139197630 in words is "one hundred thirty-nine million, one hundred ninety-seven thousand, six hundred thirty".