1975211838 has 16 divisors (see below), whose sum is σ = 4389359760. Its totient is φ = 658403928.

The previous prime is 1975211831. The next prime is 1975211851. The reversal of 1975211838 is 8381125791.

1975211838 is a `hidden beast` number, since 1 + 97 + 521 + 1 + 8 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1975211793 and 1975211802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1975211831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18288945 + ... + 18289052.

It is an arithmetic number, because the mean of its divisors is an integer number (274334985).

Almost surely, 2^1975211838 is an apocalyptic number.

1975211838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1975211838 is an abundant number, since it is smaller than the sum of its proper divisors (2414147922).

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

1975211838 is a wasteful number, since it uses less digits than its factorization.

1975211838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36578008 (or 36578002 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1975211838 is about 44443.3553863792. The cubic root of 1975211838 is about 1254.6942082335.

The spelling of 1975211838 in words is "one billion, nine hundred seventy-five million, two hundred eleven thousand, eight hundred thirty-eight".