1345447400 has 144 divisors (see below), whose sum is σ = 3506611500. Its totient is φ = 479564800.

The previous prime is 1345447381. The next prime is 1345447403. The reversal of 1345447400 is 47445431.

It can be written as a sum of positive squares in 6 ways, for example, as 947285284 + 398162116 = 30778^2 + 19954^2 .

It is not an unprimeable number, because it can be changed into a prime (1345447403) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1282076 + ... + 1283124.

Almost surely, 2^1345447400 is an apocalyptic number.

1345447400 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 1345447400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753305750).

1345447400 is an abundant number, since it is smaller than the sum of its proper divisors (2161164100).

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

1345447400 is a wasteful number, since it uses less digits than its factorization.

1345447400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 1345447400 is about 36680.3407835860. The cubic root of 1345447400 is about 1103.9656858515.

The spelling of 1345447400 in words is "one billion, three hundred forty-five million, four hundred forty-seven thousand, four hundred".