97857778 has 8 divisors (see below), whose sum is σ = 153168768. Its totient is φ = 46801524.

The previous prime is 97857757. The next prime is 97857779. The reversal of 97857778 is 87775879.

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

It is a super-2 number, since 2×97857778² = 19152289430194568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97857779) 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, 1063626 + ... + 1063717.

It is an arithmetic number, because the mean of its divisors is an integer number (19146096).

Almost surely, 2^97857778 is an apocalyptic number.

97857778 is a deficient number, since it is larger than the sum of its proper divisors (55310990).

97857778 is a wasteful number, since it uses less digits than its factorization.

97857778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127368.

The product of its digits is 6914880, while the sum is 58.

The square root of 97857778 is about 9892.3090327789. The cubic root of 97857778 is about 460.8204921573.

The spelling of 97857778 in words is "ninety-seven million, eight hundred fifty-seven thousand, seven hundred seventy-eight".