1634473890 has 384 divisors, whose sum is σ = 5377881600. Its totient is φ = 356638464.

The previous prime is 1634473849. The next prime is 1634473921. The reversal of 1634473890 is 983744361.

1634473890 is a `hidden beast` number, since 1 + 634 + 4 + 7 + 3 + 8 + 9 + 0 = 666.

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 191 ways as a sum of consecutive naturals, for example, 30839104 + ... + 30839156.

It is an arithmetic number, because the mean of its divisors is an integer number (14004900).

Almost surely, 2^1634473890 is an apocalyptic number.

1634473890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1634473890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2688940800).

1634473890 is an abundant number, since it is smaller than the sum of its proper divisors (3743407710).

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

1634473890 is an equidigital number, since it uses as much as digits as its factorization.

1634473890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1634473890 is about 40428.6271100071. The cubic root of 1634473890 is about 1177.9476653957.

The spelling of 1634473890 in words is "one billion, six hundred thirty-four million, four hundred seventy-three thousand, eight hundred ninety".