1356720456 has 256 divisors, whose sum is σ = 4464230400. Its totient is φ = 333849600.

The previous prime is 1356720451. The next prime is 1356720457. The reversal of 1356720456 is 6540276531.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1356720451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1963071 + ... + 1963761.

It is an arithmetic number, because the mean of its divisors is an integer number (17438400).

Almost surely, 2^1356720456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356720456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232115200).

1356720456 is an abundant number, since it is smaller than the sum of its proper divisors (3107509944).

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

1356720456 is a wasteful number, since it uses less digits than its factorization.

1356720456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 1356720456 is about 36833.6864296801. The cubic root of 1356720456 is about 1107.0403682210.

Adding to 1356720456 its reverse (6540276531), we get a palindrome (7896996987).

The spelling of 1356720456 in words is "one billion, three hundred fifty-six million, seven hundred twenty thousand, four hundred fifty-six".