1439017020 has 144 divisors (see below), whose sum is σ = 5282117568. Its totient is φ = 309565440.

The previous prime is 1439017009. The next prime is 1439017039. The reversal of 1439017020 is 207109341.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12171 + ... + 55010.

It is an arithmetic number, because the mean of its divisors is an integer number (36681372).

Almost surely, 2^1439017020 is an apocalyptic number.

1439017020 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 1439017020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2641058784).

1439017020 is an abundant number, since it is smaller than the sum of its proper divisors (3843100548).

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

1439017020 is a wasteful number, since it uses less digits than its factorization.

1439017020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67220 (or 67215 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1439017020 is about 37934.3778122167. The cubic root of 1439017020 is about 1128.9862262806.

The spelling of 1439017020 in words is "one billion, four hundred thirty-nine million, seventeen thousand, twenty".