1620445362 has 32 divisors (see below), whose sum is σ = 3416694720. Its totient is φ = 510935040.

The previous prime is 1620445357. The next prime is 1620445363. The reversal of 1620445362 is 2635440261.

It is a super-2 number, since 2×1620445362² = 5251686342454622088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620445363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66162 + ... + 87282.

It is an arithmetic number, because the mean of its divisors is an integer number (106771710).

Almost surely, 2^1620445362 is an apocalyptic number.

1620445362 is an abundant number, since it is smaller than the sum of its proper divisors (1796249358).

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

1620445362 is a wasteful number, since it uses less digits than its factorization.

1620445362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21818.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1620445362 is about 40254.7557687287. The cubic root of 1620445362 is about 1174.5679080008.

The spelling of 1620445362 in words is "one billion, six hundred twenty million, four hundred forty-five thousand, three hundred sixty-two".