1620327402 has 48 divisors (see below), whose sum is σ = 3676196160. Its totient is φ = 534848832.

The previous prime is 1620327389. The next prime is 1620327413. The reversal of 1620327402 is 2047230261.

1620327402 is a `hidden beast` number, since 1 + 620 + 32 + 7 + 4 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33874 + ... + 66242.

It is an arithmetic number, because the mean of its divisors is an integer number (76587420).

Almost surely, 2^1620327402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620327402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838098080).

1620327402 is an abundant number, since it is smaller than the sum of its proper divisors (2055868758).

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

1620327402 is a wasteful number, since it uses less digits than its factorization.

1620327402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32489 (or 32477 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 1620327402 is about 40253.2905735668. The cubic root of 1620327402 is about 1174.5394064963.

Adding to 1620327402 its reverse (2047230261), we get a palindrome (3667557663).

The spelling of 1620327402 in words is "one billion, six hundred twenty million, three hundred twenty-seven thousand, four hundred two".