1439730 has 48 divisors (see below), whose sum is σ = 3967704. Its totient is φ = 360960.

The previous prime is 1439729. The next prime is 1439743. The reversal of 1439730 is 379341.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 91809 = 1161^2 + 303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1439694 and 1439703.

It is a congruent number.

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, 1060 + ... + 2000.

2^1439730 is an apocalyptic number.

1439730 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 1439730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983852).

1439730 is an abundant number, since it is smaller than the sum of its proper divisors (2527974).

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

1439730 is a wasteful number, since it uses less digits than its factorization.

1439730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 1439730 is about 1199.8874947261. The cubic root of 1439730 is about 112.9172652544.

The spelling of 1439730 in words is "one million, four hundred thirty-nine thousand, seven hundred thirty".