1351536440 has 32 divisors (see below), whose sum is σ = 3111680880. Its totient is φ = 528041472.

The previous prime is 1351536409. The next prime is 1351536451. The reversal of 1351536440 is 446351531.

It is a junction number, because it is equal to n+sod(n) for n = 1351536397 and 1351536406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391169 + ... + 394608.

Almost surely, 2^1351536440 is an apocalyptic number.

1351536440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351536440 is an abundant number, since it is smaller than the sum of its proper divisors (1760144440).

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

1351536440 is a wasteful number, since it uses less digits than its factorization.

1351536440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785831 (or 785827 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1351536440 is about 36763.2484962904. The cubic root of 1351536440 is about 1105.6285716202.

Adding to 1351536440 its reverse (446351531), we get a palindrome (1797887971).

The spelling of 1351536440 in words is "one billion, three hundred fifty-one million, five hundred thirty-six thousand, four hundred forty".