1673662420 has 12 divisors (see below), whose sum is σ = 3514691124. Its totient is φ = 669464960.

The previous prime is 1673662373. The next prime is 1673662423. The reversal of 1673662420 is 242663761.

It can be written as a sum of positive squares in 2 ways, for example, as 339075396 + 1334587024 = 18414^2 + 36532^2 .

It is a super-3 number, since 3×1673662420³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1673662420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673662423) 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, 41841541 + ... + 41841580.

It is an arithmetic number, because the mean of its divisors is an integer number (292890927).

Almost surely, 2^1673662420 is an apocalyptic number.

1673662420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1673662420 is an abundant number, since it is smaller than the sum of its proper divisors (1841028704).

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

1673662420 is a wasteful number, since it uses less digits than its factorization.

1673662420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83683130 (or 83683128 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1673662420 is about 40910.4194551950. The cubic root of 1673662420 is about 1187.2876624219.

The spelling of 1673662420 in words is "one billion, six hundred seventy-three million, six hundred sixty-two thousand, four hundred twenty".