1223356406 has 8 divisors (see below), whose sum is σ = 1835484024. Its totient is φ = 611528400.

The previous prime is 1223356333. The next prime is 1223356423. The reversal of 1223356406 is 6046533221.

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

It is a super-2 number, since 2×1223356406² = 2993201792202473672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64400 + ... + 81203.

It is an arithmetic number, because the mean of its divisors is an integer number (229435503).

Almost surely, 2^1223356406 is an apocalyptic number.

1223356406 is a deficient number, since it is larger than the sum of its proper divisors (612127618).

1223356406 is a wasteful number, since it uses less digits than its factorization.

1223356406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149806.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1223356406 is about 34976.5122046210. The cubic root of 1223356406 is about 1069.5087289702.

Adding to 1223356406 its reverse (6046533221), we get a palindrome (7269889627).

The spelling of 1223356406 in words is "one billion, two hundred twenty-three million, three hundred fifty-six thousand, four hundred six".