1948722678 has 32 divisors (see below), whose sum is σ = 4949137920. Its totient is φ = 556777800.

The previous prime is 1948722649. The next prime is 1948722683. The reversal of 1948722678 is 8762278491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2577298 + ... + 2578053.

It is an arithmetic number, because the mean of its divisors is an integer number (154660560).

Almost surely, 2^1948722678 is an apocalyptic number.

1948722678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1948722678 is an abundant number, since it is smaller than the sum of its proper divisors (3000415242).

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

1948722678 is a wasteful number, since it uses less digits than its factorization.

1948722678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155369 (or 5155363 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1948722678 is about 44144.3391387843. The cubic root of 1948722678 is about 1249.0601314682.

The spelling of 1948722678 in words is "one billion, nine hundred forty-eight million, seven hundred twenty-two thousand, six hundred seventy-eight".