1990811662 has 48 divisors (see below), whose sum is σ = 3619954080. Its totient is φ = 803416320.

The previous prime is 1990811651. The next prime is 1990811681. The reversal of 1990811662 is 2661180991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681028 + ... + 683944.

It is an arithmetic number, because the mean of its divisors is an integer number (75415710).

Almost surely, 2^1990811662 is an apocalyptic number.

1990811662 is a deficient number, since it is larger than the sum of its proper divisors (1629142418).

1990811662 is a wasteful number, since it uses less digits than its factorization.

1990811662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1990811662 is about 44618.5125480444. The cubic root of 1990811662 is about 1257.9886575444.

The spelling of 1990811662 in words is "one billion, nine hundred ninety million, eight hundred eleven thousand, six hundred sixty-two".