1673299728 has 40 divisors (see below), whose sum is σ = 4802991200. Its totient is φ = 557766432.

The previous prime is 1673299717. The next prime is 1673299759. The reversal of 1673299728 is 8279923761.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1936258 + ... + 1937121.

It is an arithmetic number, because the mean of its divisors is an integer number (120074780).

Almost surely, 2^1673299728 is an apocalyptic number.

1673299728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1673299728 is an abundant number, since it is smaller than the sum of its proper divisors (3129691472).

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

1673299728 is a wasteful number, since it uses less digits than its factorization.

1673299728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873396 (or 3873384 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1673299728 is about 40905.9864567523. The cubic root of 1673299728 is about 1187.2018922687.

It can be divided in two parts, 1673 and 299728, that added together give a square (301401 = 549²).

The spelling of 1673299728 in words is "one billion, six hundred seventy-three million, two hundred ninety-nine thousand, seven hundred twenty-eight".