1345097880 has 256 divisors, whose sum is σ = 5157734400. Its totient is φ = 305441280.

The previous prime is 1345097869. The next prime is 1345097899. The reversal of 1345097880 is 887905431.

1345097880 is a `hidden beast` number, since 134 + 509 + 7 + 8 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1367869 + ... + 1368851.

It is an arithmetic number, because the mean of its divisors is an integer number (20147400).

Almost surely, 2^1345097880 is an apocalyptic number.

1345097880 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 1345097880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2578867200).

1345097880 is an abundant number, since it is smaller than the sum of its proper divisors (3812636520).

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

1345097880 is a wasteful number, since it uses less digits than its factorization.

1345097880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1345097880 is about 36675.5760690954. The cubic root of 1345097880 is about 1103.8700815927.

The spelling of 1345097880 in words is "one billion, three hundred forty-five million, ninety-seven thousand, eight hundred eighty".