1023403720 has 32 divisors (see below), whose sum is σ = 2364895800. Its totient is φ = 398297088.

The previous prime is 1023403687. The next prime is 1023403739. The reversal of 1023403720 is 273043201.

1023403720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 988096356 + 35307364 = 31434^2 + 5942^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1023403691 and 1023403700.

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, 344265 + ... + 347224.

Almost surely, 2^1023403720 is an apocalyptic number.

1023403720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023403720 is an abundant number, since it is smaller than the sum of its proper divisors (1341492080).

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

1023403720 is a wasteful number, since it uses less digits than its factorization.

1023403720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691537 (or 691533 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 1023403720 is about 31990.6817682900. The cubic root of 1023403720 is about 1007.7411598136.

Adding to 1023403720 its reverse (273043201), we get a palindrome (1296446921).

The spelling of 1023403720 in words is "one billion, twenty-three million, four hundred three thousand, seven hundred twenty".