1325943840 has 192 divisors, whose sum is σ = 4620381696. Its totient is φ = 317509632.

The previous prime is 1325943833. The next prime is 1325943851. The reversal of 1325943840 is 483495231.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228009 + ... + 233751.

It is an arithmetic number, because the mean of its divisors is an integer number (24064488).

Almost surely, 2^1325943840 is an apocalyptic number.

1325943840 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 1325943840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310190848).

1325943840 is an abundant number, since it is smaller than the sum of its proper divisors (3294437856).

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

1325943840 is a wasteful number, since it uses less digits than its factorization.

1325943840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811 (or 5803 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1325943840 is about 36413.5117779101. The cubic root of 1325943840 is about 1098.6053509811.

The spelling of 1325943840 in words is "one billion, three hundred twenty-five million, nine hundred forty-three thousand, eight hundred forty".