1941778428 has 24 divisors (see below), whose sum is σ = 4545118032. Its totient is φ = 645216384.

The previous prime is 1941778417. The next prime is 1941778439. The reversal of 1941778428 is 8248771491.

It is an interprime number because it is at equal distance from previous prime (1941778417) and next prime (1941778439).

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, 251425 + ... + 259032.

It is an arithmetic number, because the mean of its divisors is an integer number (189379918).

Almost surely, 2^1941778428 is an apocalyptic number.

It is an amenable number.

1941778428 is an abundant number, since it is smaller than the sum of its proper divisors (2603339604).

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

1941778428 is a wasteful number, since it uses less digits than its factorization.

1941778428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510781 (or 510779 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 1941778428 is about 44065.6150303159. The cubic root of 1941778428 is about 1247.5746953345.

The spelling of 1941778428 in words is "one billion, nine hundred forty-one million, seven hundred seventy-eight thousand, four hundred twenty-eight".