1634897900 has 18 divisors (see below), whose sum is σ = 3547728660. Its totient is φ = 653959120.

The previous prime is 1634897897. The next prime is 1634897917. The reversal of 1634897900 is 97984361.

It is a super-2 number, since 2×1634897900² = 5345782286848820000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8174390 + ... + 8174589.

Almost surely, 2^1634897900 is an apocalyptic number.

1634897900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1634897900 is an abundant number, since it is smaller than the sum of its proper divisors (1912830760).

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

1634897900 is a wasteful number, since it uses less digits than its factorization.

1634897900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16348993 (or 16348986 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1634897900 is about 40433.8707026671. The cubic root of 1634897900 is about 1178.0495163969.

The spelling of 1634897900 in words is "one billion, six hundred thirty-four million, eight hundred ninety-seven thousand, nine hundred".