1640760450 has 96 divisors (see below), whose sum is σ = 4659451776. Its totient is φ = 374300160.

The previous prime is 1640760437. The next prime is 1640760469. The reversal of 1640760450 is 540670461.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 684454 + ... + 686846.

It is an arithmetic number, because the mean of its divisors is an integer number (48535956).

Almost surely, 2^1640760450 is an apocalyptic number.

1640760450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640760450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329725888).

1640760450 is an abundant number, since it is smaller than the sum of its proper divisors (3018691326).

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

1640760450 is a wasteful number, since it uses less digits than its factorization.

1640760450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068 (or 3063 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1640760450 is about 40506.3013616400. The cubic root of 1640760450 is about 1179.4559519205.

The spelling of 1640760450 in words is "one billion, six hundred forty million, seven hundred sixty thousand, four hundred fifty".