1478121772 has 12 divisors (see below), whose sum is σ = 2699179056. Its totient is φ = 706927760.

The previous prime is 1478121761. The next prime is 1478121809. The reversal of 1478121772 is 2771218741.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8033179 + ... + 8033362.

It is an arithmetic number, because the mean of its divisors is an integer number (224931588).

Almost surely, 2^1478121772 is an apocalyptic number.

It is an amenable number.

1478121772 is a deficient number, since it is larger than the sum of its proper divisors (1221057284).

1478121772 is a wasteful number, since it uses less digits than its factorization.

1478121772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16066568 (or 16066566 counting only the distinct ones).

The product of its digits is 43904, while the sum is 40.

The square root of 1478121772 is about 38446.3492675182. The cubic root of 1478121772 is about 1139.1215588398.

The spelling of 1478121772 in words is "one billion, four hundred seventy-eight million, one hundred twenty-one thousand, seven hundred seventy-two".