1988604764 has 6 divisors (see below), whose sum is σ = 3480058344. Its totient is φ = 994302380.

The previous prime is 1988604691. The next prime is 1988604781. The reversal of 1988604764 is 4674068891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248575592 + ... + 248575599.

It is an arithmetic number, because the mean of its divisors is an integer number (580009724).

Almost surely, 2^1988604764 is an apocalyptic number.

It is an amenable number.

1988604764 is a deficient number, since it is larger than the sum of its proper divisors (1491453580).

1988604764 is a wasteful number, since it uses less digits than its factorization.

1988604764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497151195 (or 497151193 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 1988604764 is about 44593.7749467344. The cubic root of 1988604764 is about 1257.5236413232.

The spelling of 1988604764 in words is "one billion, nine hundred eighty-eight million, six hundred four thousand, seven hundred sixty-four".