1225406388 has 24 divisors (see below), whose sum is σ = 2859848992. Its totient is φ = 408387744.

The previous prime is 1225406333. The next prime is 1225406407. The reversal of 1225406388 is 8836045221.

It is a congruent number.

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, 107331 + ... + 118197.

Almost surely, 2^1225406388 is an apocalyptic number.

It is an amenable number.

1225406388 is an abundant number, since it is smaller than the sum of its proper divisors (1634442604).

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

1225406388 is a wasteful number, since it uses less digits than its factorization.

1225406388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271 (or 20269 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 1225406388 is about 35005.8050614466. The cubic root of 1225406388 is about 1070.1057885914.

The spelling of 1225406388 in words is "one billion, two hundred twenty-five million, four hundred six thousand, three hundred eighty-eight".