1047470778 has 80 divisors (see below), whose sum is σ = 2469852000. Its totient is φ = 331315488.

The previous prime is 1047470737. The next prime is 1047470857. The reversal of 1047470778 is 8770747401.

It is a happy number.

1047470778 is a `hidden beast` number, since 104 + 7 + 470 + 7 + 78 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 275293 + ... + 279071.

It is an arithmetic number, because the mean of its divisors is an integer number (30873150).

Almost surely, 2^1047470778 is an apocalyptic number.

1047470778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1047470778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234926000).

1047470778 is an abundant number, since it is smaller than the sum of its proper divisors (1422381222).

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

1047470778 is a wasteful number, since it uses less digits than its factorization.

1047470778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 45.

The square root of 1047470778 is about 32364.6532192143. The cubic root of 1047470778 is about 1015.5796079664.

The spelling of 1047470778 in words is "one billion, forty-seven million, four hundred seventy thousand, seven hundred seventy-eight".