1947478772 has 12 divisors (see below), whose sum is σ = 3487346016. Its totient is φ = 951094200.

The previous prime is 1947478759. The next prime is 1947478781. The reversal of 1947478772 is 2778747491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5661104 + ... + 5661447.

It is an arithmetic number, because the mean of its divisors is an integer number (290612168).

Almost surely, 2^1947478772 is an apocalyptic number.

It is an amenable number.

1947478772 is a deficient number, since it is larger than the sum of its proper divisors (1539867244).

1947478772 is a wasteful number, since it uses less digits than its factorization.

1947478772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11322598 (or 11322596 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 56.

The square root of 1947478772 is about 44130.2478125832. The cubic root of 1947478772 is about 1248.7943087809.

The spelling of 1947478772 in words is "one billion, nine hundred forty-seven million, four hundred seventy-eight thousand, seven hundred seventy-two".