1906401984 has 28 divisors (see below), whose sum is σ = 5044022424. Its totient is φ = 635467264.

The previous prime is 1906401961. The next prime is 1906402021. The reversal of 1906401984 is 4891046091.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4964397 + ... + 4964780.

It is an arithmetic number, because the mean of its divisors is an integer number (180143658).

Almost surely, 2^1906401984 is an apocalyptic number.

It is an amenable number.

1906401984 is an abundant number, since it is smaller than the sum of its proper divisors (3137620440).

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

1906401984 is an equidigital number, since it uses as much as digits as its factorization.

1906401984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929192 (or 9929182 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1906401984 is about 43662.3634724462. The cubic root of 1906401984 is about 1239.9518677120.

The spelling of 1906401984 in words is "one billion, nine hundred six million, four hundred one thousand, nine hundred eighty-four".