1634389290 has 48 divisors (see below), whose sum is σ = 4312852128. Its totient is φ = 429330528.

The previous prime is 1634389213. The next prime is 1634389297. The reversal of 1634389290 is 929834361.

It is a happy number.

1634389290 is a `hidden beast` number, since 1 + 634 + 3 + 8 + 9 + 2 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1634389297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129492 + ... + 141551.

It is an arithmetic number, because the mean of its divisors is an integer number (89851086).

Almost surely, 2^1634389290 is an apocalyptic number.

1634389290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1634389290 is an abundant number, since it is smaller than the sum of its proper divisors (2678462838).

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

1634389290 is a wasteful number, since it uses less digits than its factorization.

1634389290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271123 (or 271120 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1634389290 is about 40427.5808081562. The cubic root of 1634389290 is about 1177.9273416098.

The spelling of 1634389290 in words is "one billion, six hundred thirty-four million, three hundred eighty-nine thousand, two hundred ninety".