1304545440 has 96 divisors (see below), whose sum is σ = 4482910656. Its totient is φ = 316252160.

The previous prime is 1304545433. The next prime is 1304545447. The reversal of 1304545440 is 445454031.

It is an interprime number because it is at equal distance from previous prime (1304545433) and next prime (1304545447).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1304545398 and 1304545407.

It is not an unprimeable number, because it can be changed into a prime (1304545447) 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, 118257 + ... + 128816.

It is an arithmetic number, because the mean of its divisors is an integer number (46696986).

Almost surely, 2^1304545440 is an apocalyptic number.

1304545440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304545440 is an abundant number, since it is smaller than the sum of its proper divisors (3178365216).

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

1304545440 is a wasteful number, since it uses less digits than its factorization.

1304545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247102 (or 247094 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1304545440 is about 36118.4916628588. The cubic root of 1304545440 is about 1092.6634190101.

Adding to 1304545440 its reverse (445454031), we get a palindrome (1749999471).

It can be divided in two parts, 13045 and 45440, that added together give a palindrome (58485).

The spelling of 1304545440 in words is "one billion, three hundred four million, five hundred forty-five thousand, four hundred forty".