1351226340 has 96 divisors (see below), whose sum is σ = 4306417920. Its totient is φ = 351532800.

The previous prime is 1351226323. The next prime is 1351226399. The reversal of 1351226340 is 436221531.

1351226340 is a `hidden beast` number, since 1 + 3 + 5 + 1 + 22 + 634 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8376 + ... + 52655.

It is an arithmetic number, because the mean of its divisors is an integer number (44858520).

Almost surely, 2^1351226340 is an apocalyptic number.

1351226340 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 1351226340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2153208960).

1351226340 is an abundant number, since it is smaller than the sum of its proper divisors (2955191580).

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

1351226340 is a wasteful number, since it uses less digits than its factorization.

1351226340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61090 (or 61082 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1351226340 is about 36759.0307271560. The cubic root of 1351226340 is about 1105.5440057303.

Adding to 1351226340 its reverse (436221531), we get a palindrome (1787447871).

The spelling of 1351226340 in words is "one billion, three hundred fifty-one million, two hundred twenty-six thousand, three hundred forty".