139919740 has 48 divisors (see below), whose sum is σ = 307077120. Its totient is φ = 53490240.

The previous prime is 139919737. The next prime is 139919753. The reversal of 139919740 is 47919931.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50101 + ... + 52819.

It is an arithmetic number, because the mean of its divisors is an integer number (6397440).

Almost surely, 2^139919740 is an apocalyptic number.

139919740 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 139919740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153538560).

139919740 is an abundant number, since it is smaller than the sum of its proper divisors (167157380).

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

139919740 is a wasteful number, since it uses less digits than its factorization.

139919740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842 (or 2840 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 139919740 is about 11828.7674759461. The cubic root of 139919740 is about 519.1501651278.

The spelling of 139919740 in words is "one hundred thirty-nine million, nine hundred nineteen thousand, seven hundred forty".