1325737840 has 40 divisors (see below), whose sum is σ = 3522676320. Its totient is φ = 454538496.

The previous prime is 1325737799. The next prime is 1325737849. The reversal of 1325737840 is 487375231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1325737793 and 1325737802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325737849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183135 + ... + 1184254.

It is an arithmetic number, because the mean of its divisors is an integer number (88066908).

Almost surely, 2^1325737840 is an apocalyptic number.

1325737840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1325737840 is an abundant number, since it is smaller than the sum of its proper divisors (2196938480).

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

1325737840 is a wasteful number, since it uses less digits than its factorization.

1325737840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367409 (or 2367403 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 1325737840 is about 36410.6830476991. The cubic root of 1325737840 is about 1098.5484545484.

The spelling of 1325737840 in words is "one billion, three hundred twenty-five million, seven hundred thirty-seven thousand, eight hundred forty".