139015650 has 48 divisors (see below), whose sum is σ = 347013504. Its totient is φ = 36828480.

The previous prime is 139015637. The next prime is 139015663. The reversal of 139015650 is 56510931.

It is an interprime number because it is at equal distance from previous prime (139015637) and next prime (139015663).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20599 + ... + 26501.

It is an arithmetic number, because the mean of its divisors is an integer number (7229448).

Almost surely, 2^139015650 is an apocalyptic number.

139015650 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 139015650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173506752).

139015650 is an abundant number, since it is smaller than the sum of its proper divisors (207997854).

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

139015650 is a wasteful number, since it uses less digits than its factorization.

139015650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075 (or 6070 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 139015650 is about 11790.4898117084. The cubic root of 139015650 is about 518.0295869168.

The spelling of 139015650 in words is "one hundred thirty-nine million, fifteen thousand, six hundred fifty".