1634137990 has 16 divisors (see below), whose sum is σ = 2948156640. Its totient is φ = 652164480.

The previous prime is 1634137969. The next prime is 1634138003. The reversal of 1634137990 is 997314361.

It is a super-2 number, since 2×1634137990² = 5340813940722480200, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 181731 + ... + 190510.

It is an arithmetic number, because the mean of its divisors is an integer number (184259790).

Almost surely, 2^1634137990 is an apocalyptic number.

1634137990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1634137990 is a deficient number, since it is larger than the sum of its proper divisors (1314018650).

1634137990 is a wasteful number, since it uses less digits than its factorization.

1634137990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372687.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 1634137990 is about 40424.4726619903. The cubic root of 1634137990 is about 1177.8669667009.

The spelling of 1634137990 in words is "one billion, six hundred thirty-four million, one hundred thirty-seven thousand, nine hundred ninety".