1355778996 has 96 divisors (see below), whose sum is σ = 3725568000. Its totient is φ = 378318720.

The previous prime is 1355778947. The next prime is 1355778997. The reversal of 1355778996 is 6998775531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355778997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027225 + ... + 1028543.

It is an arithmetic number, because the mean of its divisors is an integer number (38808000).

Almost surely, 2^1355778996 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 1355778996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784000).

1355778996 is an abundant number, since it is smaller than the sum of its proper divisors (2369789004).

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

1355778996 is a wasteful number, since it uses less digits than its factorization.

1355778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1947 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 60.

The square root of 1355778996 is about 36820.9043343588. The cubic root of 1355778996 is about 1106.7842419152.

The spelling of 1355778996 in words is "one billion, three hundred fifty-five million, seven hundred seventy-eight thousand, nine hundred ninety-six".