1260340398 has 112 divisors (see below), whose sum is σ = 2966524416. Its totient is φ = 401008320.

The previous prime is 1260340397. The next prime is 1260340421. The reversal of 1260340398 is 8930430621.

1260340398 is a `hidden beast` number, since 1 + 2 + 603 + 40 + 3 + 9 + 8 = 666.

1260340398 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260340397) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3290515 + ... + 3290897.

Almost surely, 2^1260340398 is an apocalyptic number.

1260340398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1260340398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483262208).

1260340398 is an abundant number, since it is smaller than the sum of its proper divisors (1706184018).

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

1260340398 is an equidigital number, since it uses as much as digits as its factorization.

1260340398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1260340398 is about 35501.2731884365. The cubic root of 1260340398 is about 1080.1795534803.

The spelling of 1260340398 in words is "one billion, two hundred sixty million, three hundred forty thousand, three hundred ninety-eight".