1964726628 has 12 divisors (see below), whose sum is σ = 4584362160. Its totient is φ = 654908872.

The previous prime is 1964726549. The next prime is 1964726633. The reversal of 1964726628 is 8266274691.

It is a tau number, because it is divible by the number of its divisors (12).

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, 81863598 + ... + 81863621.

It is an arithmetic number, because the mean of its divisors is an integer number (382030180).

Almost surely, 2^1964726628 is an apocalyptic number.

It is an amenable number.

1964726628 is an abundant number, since it is smaller than the sum of its proper divisors (2619635532).

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

1964726628 is a wasteful number, since it uses less digits than its factorization.

1964726628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163727226 (or 163727224 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 1964726628 is about 44325.2369198406. The cubic root of 1964726628 is about 1252.4701295262.

The spelling of 1964726628 in words is "one billion, nine hundred sixty-four million, seven hundred twenty-six thousand, six hundred twenty-eight".