1640610244 has 96 divisors (see below), whose sum is σ = 3643944192. Its totient is φ = 628992000.

The previous prime is 1640610239. The next prime is 1640610253. The reversal of 1640610244 is 4420160461.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3148704 + ... + 3149224.

It is an arithmetic number, because the mean of its divisors is an integer number (37957752).

Almost surely, 2^1640610244 is an apocalyptic number.

1640610244 is a gapful number since it is divisible by the number (14) 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 1640610244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1821972096).

1640610244 is an abundant number, since it is smaller than the sum of its proper divisors (2003333948).

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

1640610244 is a wasteful number, since it uses less digits than its factorization.

1640610244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1640610244 is about 40504.4472126210. The cubic root of 1640610244 is about 1179.4199591045.

The spelling of 1640610244 in words is "one billion, six hundred forty million, six hundred ten thousand, two hundred forty-four".