1620417474 has 40 divisors (see below), whose sum is σ = 3910243260. Its totient is φ = 498589344.

The previous prime is 1620417473. The next prime is 1620417493. The reversal of 1620417474 is 4747140261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1584597249 + 35820225 = 39807^2 + 5985^2 .

It is not an unprimeable number, because it can be changed into a prime (1620417473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 382609 + ... + 386820.

Almost surely, 2^1620417474 is an apocalyptic number.

1620417474 is an abundant number, since it is smaller than the sum of its proper divisors (2289825786).

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

1620417474 is a wasteful number, since it uses less digits than its factorization.

1620417474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769456 (or 769447 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 1620417474 is about 40254.4093733842. The cubic root of 1620417474 is about 1174.5611698249.

The spelling of 1620417474 in words is "one billion, six hundred twenty million, four hundred seventeen thousand, four hundred seventy-four".