1620454446 has 24 divisors (see below), whose sum is σ = 3781060920. Its totient is φ = 498601296.

The previous prime is 1620454421. The next prime is 1620454453. The reversal of 1620454446 is 6444540261.

1620454446 is a `hidden beast` number, since 1 + 6 + 204 + 5 + 4 + 446 = 666.

It is a super-2 number, since 2×1620454446² = 5251745223122333832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1620454446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3462276 + ... + 3462743.

It is an arithmetic number, because the mean of its divisors is an integer number (157544205).

Almost surely, 2^1620454446 is an apocalyptic number.

1620454446 is an abundant number, since it is smaller than the sum of its proper divisors (2160606474).

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

1620454446 is a wasteful number, since it uses less digits than its factorization.

1620454446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925040 (or 6925037 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 1620454446 is about 40254.8685999594. The cubic root of 1620454446 is about 1174.5701028202.

It can be divided in two parts, 1620454 and 446, that added together give a triangular number (1620900 = T₁₈₀₀).

The spelling of 1620454446 in words is "one billion, six hundred twenty million, four hundred fifty-four thousand, four hundred forty-six".