1019844240 has 80 divisors (see below), whose sum is σ = 3199670208. Its totient is φ = 268676608.

The previous prime is 1019844239. The next prime is 1019844253. The reversal of 1019844240 is 424489101.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1019844240² = 2080164547722355200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5679 + ... + 45518.

Almost surely, 2^1019844240 is an apocalyptic number.

1019844240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1019844240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599835104).

1019844240 is an abundant number, since it is smaller than the sum of its proper divisors (2179825968).

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

1019844240 is a wasteful number, since it uses less digits than its factorization.

1019844240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51296 (or 51290 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1019844240 is about 31935.0002348520. Note that the first 3 decimals coincide. The cubic root of 1019844240 is about 1006.5714678820.

The spelling of 1019844240 in words is "one billion, nineteen million, eight hundred forty-four thousand, two hundred forty".