1023215406 has 16 divisors (see below), whose sum is σ = 2081116800. Its totient is φ = 335290808.

The previous prime is 1023215383. The next prime is 1023215407. The reversal of 1023215406 is 6045123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023215407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444866 + ... + 1445573.

It is an arithmetic number, because the mean of its divisors is an integer number (130069800).

Almost surely, 2^1023215406 is an apocalyptic number.

1023215406 is an abundant number, since it is smaller than the sum of its proper divisors (1057901394).

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

1023215406 is a wasteful number, since it uses less digits than its factorization.

1023215406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890503.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1023215406 is about 31987.7383695690. The cubic root of 1023215406 is about 1007.6793453651.

Adding to 1023215406 its reverse (6045123201), we get a palindrome (7068338607).

The spelling of 1023215406 in words is "one billion, twenty-three million, two hundred fifteen thousand, four hundred six".