1304532240 has 80 divisors (see below), whose sum is σ = 4411699776. Its totient is φ = 316249600.

The previous prime is 1304532223. The next prime is 1304532241. The reversal of 1304532240 is 422354031.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1304532240.

It is not an unprimeable number, because it can be changed into a prime (1304532241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244431 + ... + 249710.

Almost surely, 2^1304532240 is an apocalyptic number.

1304532240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304532240 is an abundant number, since it is smaller than the sum of its proper divisors (3107167536).

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

1304532240 is a wasteful number, since it uses less digits than its factorization.

1304532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494168 (or 494162 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1304532240 is about 36118.3089305133. The cubic root of 1304532240 is about 1092.6597336380.

Adding to 1304532240 its reverse (422354031), we get a palindrome (1726886271).

The spelling of 1304532240 in words is "one billion, three hundred four million, five hundred thirty-two thousand, two hundred forty".