768556428 has 24 divisors (see below), whose sum is σ = 1814906688. Its totient is φ = 253098576.

The previous prime is 768556423. The next prime is 768556457. The reversal of 768556428 is 824655867.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (768556421) 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, 384826 + ... + 386817.

It is an arithmetic number, because the mean of its divisors is an integer number (75621112).

Almost surely, 2^768556428 is an apocalyptic number.

It is an amenable number.

768556428 is an abundant number, since it is smaller than the sum of its proper divisors (1046350260).

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

768556428 is a wasteful number, since it uses less digits than its factorization.

768556428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771733 (or 771731 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The square root of 768556428 is about 27722.8502863612. The cubic root of 768556428 is about 915.9925042133.

The spelling of 768556428 in words is "seven hundred sixty-eight million, five hundred fifty-six thousand, four hundred twenty-eight".