1973453328 has 320 divisors, whose sum is σ = 7239536640. Its totient is φ = 499737600.

The previous prime is 1973453327. The next prime is 1973453351. The reversal of 1973453328 is 8233543791.

1973453328 is a `hidden beast` number, since 1 + 97 + 3 + 4 + 533 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (1973453327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1363101 + ... + 1364547.

It is an arithmetic number, because the mean of its divisors is an integer number (22623552).

Almost surely, 2^1973453328 is an apocalyptic number.

1973453328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1973453328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3619768320).

1973453328 is an abundant number, since it is smaller than the sum of its proper divisors (5266083312).

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

1973453328 is a wasteful number, since it uses less digits than its factorization.

1973453328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1511 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 1973453328 is about 44423.5672588323. The cubic root of 1973453328 is about 1254.3217507297.

The spelling of 1973453328 in words is "one billion, nine hundred seventy-three million, four hundred fifty-three thousand, three hundred twenty-eight".