97778028 has 24 divisors (see below), whose sum is σ = 240157120. Its totient is φ = 30877200.

The previous prime is 97777997. The next prime is 97778029. The reversal of 97778028 is 82087779.

It is not an unprimeable number, because it can be changed into a prime (97778029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214198 + ... + 214653.

Almost surely, 2^97778028 is an apocalyptic number.

It is an amenable number.

97778028 is an abundant number, since it is smaller than the sum of its proper divisors (142379092).

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

97778028 is a wasteful number, since it uses less digits than its factorization.

97778028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428877 (or 428875 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 97778028 is about 9888.2773019369. The cubic root of 97778028 is about 460.6952749871.

The spelling of 97778028 in words is "ninety-seven million, seven hundred seventy-eight thousand, twenty-eight".