1224257408 has 32 divisors (see below), whose sum is σ = 2660676120. Its totient is φ = 556480000.

The previous prime is 1224257407. The next prime is 1224257459. The reversal of 1224257408 is 8047524221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224257401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433343 + ... + 436158.

Almost surely, 2^1224257408 is an apocalyptic number.

It is an amenable number.

1224257408 is an abundant number, since it is smaller than the sum of its proper divisors (1436418712).

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

1224257408 is an equidigital number, since it uses as much as digits as its factorization.

1224257408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869526 (or 869514 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 1224257408 is about 34989.3899346645. The cubic root of 1224257408 is about 1069.7712289320.

The spelling of 1224257408 in words is "one billion, two hundred twenty-four million, two hundred fifty-seven thousand, four hundred eight".