1023400555 has 8 divisors (see below), whose sum is σ = 1230242400. Its totient is φ = 817279296.

The previous prime is 1023400531. The next prime is 1023400639. The reversal of 1023400555 is 5550043201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1023400555 - 2²¹ = 1021303403 is a prime.

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, 177015 + ... + 182704.

It is an arithmetic number, because the mean of its divisors is an integer number (153780300).

Almost surely, 2^1023400555 is an apocalyptic number.

1023400555 is a deficient number, since it is larger than the sum of its proper divisors (206841845).

1023400555 is an equidigital number, since it uses as much as digits as its factorization.

1023400555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360293.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1023400555 is about 31990.6323007220. The cubic root of 1023400555 is about 1007.7401209587.

Adding to 1023400555 its reverse (5550043201), we get a palindrome (6573443756).

The spelling of 1023400555 in words is "one billion, twenty-three million, four hundred thousand, five hundred fifty-five".