1345402240 has 192 divisors, whose sum is σ = 3982577760. Its totient is φ = 425558016.

The previous prime is 1345402211. The next prime is 1345402243. The reversal of 1345402240 is 422045431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345402243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 756232 + ... + 758008.

Almost surely, 2^1345402240 is an apocalyptic number.

1345402240 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 1345402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991288880).

1345402240 is an abundant number, since it is smaller than the sum of its proper divisors (2637175520).

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

1345402240 is a wasteful number, since it uses less digits than its factorization.

1345402240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1345402240 is about 36679.7251898102. The cubic root of 1345402240 is about 1103.9533341613.

Adding to 1345402240 its reverse (422045431), we get a palindrome (1767447671).

It can be divided in two parts, 134540 and 2240, that multiplied together give a square (301369600 = 17360²).

The spelling of 1345402240 in words is "one billion, three hundred forty-five million, four hundred two thousand, two hundred forty".