1890726984 has 24 divisors (see below), whose sum is σ = 5120719110. Its totient is φ = 630242304.

The previous prime is 1890726967. The next prime is 1890726989. The reversal of 1890726984 is 4896270981.

It can be written as a sum of positive squares in only one way, i.e., 1720424484 + 170302500 = 41478^2 + 13050^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1890726984.

It is not an unprimeable number, because it can be changed into a prime (1890726989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13129977 + ... + 13130120.

Almost surely, 2^1890726984 is an apocalyptic number.

It is an amenable number.

1890726984 is an abundant number, since it is smaller than the sum of its proper divisors (3229992126).

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

1890726984 is a wasteful number, since it uses less digits than its factorization.

1890726984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26260109 (or 26260102 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1890726984 is about 43482.4905450458. The cubic root of 1890726984 is about 1236.5440938794.

The spelling of 1890726984 in words is "one billion, eight hundred ninety million, seven hundred twenty-six thousand, nine hundred eighty-four".