1620303734 has 8 divisors (see below), whose sum is σ = 2777663568. Its totient is φ = 694415880.

The previous prime is 1620303721. The next prime is 1620303739. The reversal of 1620303734 is 4373030261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1620303697 and 1620303706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620303739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57867977 + ... + 57868004.

It is an arithmetic number, because the mean of its divisors is an integer number (347207946).

Almost surely, 2^1620303734 is an apocalyptic number.

1620303734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1620303734 is a deficient number, since it is larger than the sum of its proper divisors (1157359834).

1620303734 is a wasteful number, since it uses less digits than its factorization.

1620303734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115735990.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 1620303734 is about 40252.9965841054. The cubic root of 1620303734 is about 1174.5336876656.

Adding to 1620303734 its reverse (4373030261), we get a palindrome (5993333995).

The spelling of 1620303734 in words is "one billion, six hundred twenty million, three hundred three thousand, seven hundred thirty-four".