1941279840 has 72 divisors (see below), whose sum is σ = 6624622368. Its totient is φ = 517674240.

The previous prime is 1941279829. The next prime is 1941279853. The reversal of 1941279840 is 489721491.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672616 + ... + 675495.

It is an arithmetic number, because the mean of its divisors is an integer number (92008644).

Almost surely, 2^1941279840 is an apocalyptic number.

1941279840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1941279840 is an abundant number, since it is smaller than the sum of its proper divisors (4683342528).

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

1941279840 is a wasteful number, since it uses less digits than its factorization.

1941279840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348132 (or 1348121 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1941279840 is about 44059.9573308917. The cubic root of 1941279840 is about 1247.4679067999.

The spelling of 1941279840 in words is "one billion, nine hundred forty-one million, two hundred seventy-nine thousand, eight hundred forty".