1634857938 has 64 divisors (see below), whose sum is σ = 4396273920. Its totient is φ = 439623936.

The previous prime is 1634857909. The next prime is 1634857951. The reversal of 1634857938 is 8397584361.

1634857938 is a `hidden beast` number, since 1 + 6 + 34 + 8 + 579 + 38 = 666.

It is a super-2 number, since 2×1634857938² = 5345520954883223688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 120781 + ... + 133632.

It is an arithmetic number, because the mean of its divisors is an integer number (68691780).

Almost surely, 2^1634857938 is an apocalyptic number.

1634857938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1634857938 is an abundant number, since it is smaller than the sum of its proper divisors (2761415982).

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

1634857938 is a wasteful number, since it uses less digits than its factorization.

1634857938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254448 (or 254442 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1634857938 is about 40433.3765347392. The cubic root of 1634857938 is about 1178.0399179181.

The spelling of 1634857938 in words is "one billion, six hundred thirty-four million, eight hundred fifty-seven thousand, nine hundred thirty-eight".