1906821426 has 16 divisors (see below), whose sum is σ = 3814223328. Its totient is φ = 635510400.

The previous prime is 1906821409. The next prime is 1906821431. The reversal of 1906821426 is 6241286091.

1906821426 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26781 + ... + 67311.

It is an arithmetic number, because the mean of its divisors is an integer number (238388958).

Almost surely, 2^1906821426 is an apocalyptic number.

1906821426 is an abundant number, since it is smaller than the sum of its proper divisors (1907401902).

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

1906821426 is a wasteful number, since it uses less digits than its factorization.

1906821426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48377.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1906821426 is about 43667.1664526106. The cubic root of 1906821426 is about 1240.0427981239.

The spelling of 1906821426 in words is "one billion, nine hundred six million, eight hundred twenty-one thousand, four hundred twenty-six".