1990469376 has 324 divisors, whose sum is σ = 6933857112. Its totient is φ = 567834624.

The previous prime is 1990469363. The next prime is 1990469387. The reversal of 1990469376 is 6739640991.

It is a tau number, because it is divible by the number of its divisors (324).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3047866 + ... + 3048518.

Almost surely, 2^1990469376 is an apocalyptic number.

1990469376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990469376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3466928556).

1990469376 is an abundant number, since it is smaller than the sum of its proper divisors (4943387736).

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

1990469376 is an frugal number, since it uses more digits than its factorization.

1990469376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 1990469376 is about 44614.6766882827. The cubic root of 1990469376 is about 1257.9165568708.

The spelling of 1990469376 in words is "one billion, nine hundred ninety million, four hundred sixty-nine thousand, three hundred seventy-six".