1906474881 has 4 divisors (see below), whose sum is σ = 2541966512. Its totient is φ = 1270983252.

The previous prime is 1906474879. The next prime is 1906474897. The reversal of 1906474881 is 1884746091.

1906474881 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1906474881 - 2¹ = 1906474879 is a prime.

It is a super-2 number, since 2×1906474881² = 7269292943767928322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1906474881.

It is not an unprimeable number, because it can be changed into a prime (1906474861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317745811 + ... + 317745816.

It is an arithmetic number, because the mean of its divisors is an integer number (635491628).

Almost surely, 2^1906474881 is an apocalyptic number.

It is an amenable number.

1906474881 is a deficient number, since it is larger than the sum of its proper divisors (635491631).

1906474881 is an equidigital number, since it uses as much as digits as its factorization.

1906474881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635491630.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1906474881 is about 43663.1982452042. The cubic root of 1906474881 is about 1239.9676719373.

The spelling of 1906474881 in words is "one billion, nine hundred six million, four hundred seventy-four thousand, eight hundred eighty-one".