1916421192 has 96 divisors (see below), whose sum is σ = 5967561600. Its totient is φ = 544246272.

The previous prime is 1916421173. The next prime is 1916421257. The reversal of 1916421192 is 2911246191.

It is a happy number.

1916421192 is a `hidden beast` number, since 1 + 9 + 1 + 642 + 1 + 1 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72784 + ... + 95552.

It is an arithmetic number, because the mean of its divisors is an integer number (62162100).

Almost surely, 2^1916421192 is an apocalyptic number.

1916421192 is a gapful number since it is divisible by the number (12) 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 1916421192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2983780800).

1916421192 is an abundant number, since it is smaller than the sum of its proper divisors (4051140408).

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

1916421192 is a wasteful number, since it uses less digits than its factorization.

1916421192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22955 (or 22948 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1916421192 is about 43776.9481805208. The cubic root of 1916421192 is about 1242.1202867622.

The spelling of 1916421192 in words is "one billion, nine hundred sixteen million, four hundred twenty-one thousand, one hundred ninety-two".