1516640 has 24 divisors (see below), whose sum is σ = 3583440. Its totient is φ = 606592.

The previous prime is 1516639. The next prime is 1516651. The reversal of 1516640 is 466151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4580 + ... + 4899.

It is an arithmetic number, because the mean of its divisors is an integer number (149310).

2^1516640 is an apocalyptic number.

1516640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1516640 is an abundant number, since it is smaller than the sum of its proper divisors (2066800).

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

1516640 is an equidigital number, since it uses as much as digits as its factorization.

1516640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494 (or 9486 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1516640 is about 1231.5193867739. The cubic root of 1516640 is about 114.8931584879.

The spelling of 1516640 in words is "one million, five hundred sixteen thousand, six hundred forty".