1942198440 has 256 divisors, whose sum is σ = 7419686400. Its totient is φ = 395587584.

The previous prime is 1942198429. The next prime is 1942198451. The reversal of 1942198440 is 448912491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1942198429) and next prime (1942198451).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1942198392 and 1942198401.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 313614 + ... + 319746.

It is an arithmetic number, because the mean of its divisors is an integer number (28983150).

Almost surely, 2^1942198440 is an apocalyptic number.

1942198440 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 1942198440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3709843200).

1942198440 is an abundant number, since it is smaller than the sum of its proper divisors (5477487960).

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

1942198440 is a wasteful number, since it uses less digits than its factorization.

1942198440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6196 (or 6192 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1942198440 is about 44070.3805293306. The cubic root of 1942198440 is about 1247.6646401259.

The spelling of 1942198440 in words is "one billion, nine hundred forty-two million, one hundred ninety-eight thousand, four hundred forty".