1791978044 has 24 divisors (see below), whose sum is σ = 3225750528. Its totient is φ = 870554160.

The previous prime is 1791978037. The next prime is 1791978053. The reversal of 1791978044 is 4408791971.

It is a super-2 number, since 2×1791978044² = 6422370620356131872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1791977983 and 1791978001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5579 + ... + 60125.

It is an arithmetic number, because the mean of its divisors is an integer number (134406272).

Almost surely, 2^1791978044 is an apocalyptic number.

It is an amenable number.

1791978044 is a deficient number, since it is larger than the sum of its proper divisors (1433772484).

1791978044 is a wasteful number, since it uses less digits than its factorization.

1791978044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54785 (or 54783 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 1791978044 is about 42331.7616453651. The cubic root of 1791978044 is about 1214.6306280643.

The spelling of 1791978044 in words is "one billion, seven hundred ninety-one million, nine hundred seventy-eight thousand, forty-four".