139303440 has 240 divisors, whose sum is σ = 522288000. Its totient is φ = 33067008.

The previous prime is 139303403. The next prime is 139303447. The reversal of 139303440 is 44303931.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (139303447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232261 + ... + 232859.

It is an arithmetic number, because the mean of its divisors is an integer number (2176200).

Almost surely, 2^139303440 is an apocalyptic number.

139303440 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 139303440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261144000).

139303440 is an abundant number, since it is smaller than the sum of its proper divisors (382984560).

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

139303440 is a wasteful number, since it uses less digits than its factorization.

139303440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 139303440 is about 11802.6878294734. The cubic root of 139303440 is about 518.3868152225.

The spelling of 139303440 in words is "one hundred thirty-nine million, three hundred three thousand, four hundred forty".