19428198408 has 32 divisors (see below), whose sum is σ = 53967218400. Its totient is φ = 6476066064.

The previous prime is 19428198407. The next prime is 19428198409. The reversal of 19428198408 is 80489182491.

It is a happy number.

19428198408 is a `hidden beast` number, since 1 + 9 + 42 + 8 + 198 + 408 = 666.

It is an interprime number because it is at equal distance from previous prime (19428198407) and next prime (19428198409).

It is a super-2 number, since 2×19428198408² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (19428198407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44972466 + ... + 44972897.

It is an arithmetic number, because the mean of its divisors is an integer number (1686475575).

Almost surely, 2^19428198408 is an apocalyptic number.

19428198408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19428198408 is an abundant number, since it is smaller than the sum of its proper divisors (34539019992).

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

19428198408 is a wasteful number, since it uses less digits than its factorization.

19428198408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89945378 (or 89945368 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 19428198408 in words is "nineteen billion, four hundred twenty-eight million, one hundred ninety-eight thousand, four hundred eight".