1356667798 has 4 divisors (see below), whose sum is σ = 2035001700. Its totient is φ = 678333898.

The previous prime is 1356667777. The next prime is 1356667799. The reversal of 1356667798 is 8977666531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356667799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339166948 + ... + 339166951.

It is an arithmetic number, because the mean of its divisors is an integer number (508750425).

Almost surely, 2^1356667798 is an apocalyptic number.

1356667798 is a deficient number, since it is larger than the sum of its proper divisors (678333902).

1356667798 is an equidigital number, since it uses as much as digits as its factorization.

1356667798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678333901.

The product of its digits is 11430720, while the sum is 58.

The square root of 1356667798 is about 36832.9716151168. The cubic root of 1356667798 is about 1107.0260456228.

The spelling of 1356667798 in words is "one billion, three hundred fifty-six million, six hundred sixty-seven thousand, seven hundred ninety-eight".