1949447678 has 8 divisors (see below), whose sum is σ = 2967816072. Its totient is φ = 960175656.

The previous prime is 1949447677. The next prime is 1949447693. The reversal of 1949447678 is 8767449491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949447677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7273925 + ... + 7274192.

It is an arithmetic number, because the mean of its divisors is an integer number (370977009).

Almost surely, 2^1949447678 is an apocalyptic number.

1949447678 is a deficient number, since it is larger than the sum of its proper divisors (1018368394).

1949447678 is a wasteful number, since it uses less digits than its factorization.

1949447678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14548186.

The product of its digits is 12192768, while the sum is 59.

The square root of 1949447678 is about 44152.5500735801. The cubic root of 1949447678 is about 1249.2150117780.

The spelling of 1949447678 in words is "one billion, nine hundred forty-nine million, four hundred forty-seven thousand, six hundred seventy-eight".