1345981632 has 56 divisors (see below), whose sum is σ = 3621633600. Its totient is φ = 441052416.

The previous prime is 1345981631. The next prime is 1345981667. The reversal of 1345981632 is 2361895431.

It is not an unprimeable number, because it can be changed into a prime (1345981631) 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, 48082 + ... + 70737.

Almost surely, 2^1345981632 is an apocalyptic number.

1345981632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1345981632 is an abundant number, since it is smaller than the sum of its proper divisors (2275651968).

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

1345981632 is a wasteful number, since it uses less digits than its factorization.

1345981632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118893 (or 118883 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 1345981632 is about 36687.6223268829. The cubic root of 1345981632 is about 1104.1117824222. Note that the first 3 decimals are identical.

The spelling of 1345981632 in words is "one billion, three hundred forty-five million, nine hundred eighty-one thousand, six hundred thirty-two".