1600006640 has 40 divisors (see below), whose sum is σ = 3754164480. Its totient is φ = 634127616.

The previous prime is 1600006633. The next prime is 1600006643. The reversal of 1600006640 is 466000061.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600006643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83024 + ... + 100463.

It is an arithmetic number, because the mean of its divisors is an integer number (93854112).

Almost surely, 2^1600006640 is an apocalyptic number.

1600006640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1600006640 is an abundant number, since it is smaller than the sum of its proper divisors (2154157840).

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

1600006640 is a wasteful number, since it uses less digits than its factorization.

1600006640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183609 (or 183603 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1600006640 is about 40000.0829999139. The cubic root of 1600006640 is about 1169.6087132394.

The spelling of 1600006640 in words is "one billion, six hundred million, six thousand, six hundred forty".