1613616 has 20 divisors (see below), whose sum is σ = 4168632. Its totient is φ = 537856.

The previous prime is 1613609. The next prime is 1613621. The reversal of 1613616 is 6163161.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 16761 + ... + 16856.

2^1613616 is an apocalyptic number.

1613616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1613616 is an abundant number, since it is smaller than the sum of its proper divisors (2555016).

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

1613616 is a wasteful number, since it uses less digits than its factorization.

1613616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33628 (or 33622 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 1613616 is about 1270.2818584865. The cubic root of 1613616 is about 117.2915513538.

Adding to 1613616 its reverse (6163161), we get a palindrome (7776777).

The spelling of 1613616 in words is "one million, six hundred thirteen thousand, six hundred sixteen".