897730978 has 8 divisors (see below), whose sum is σ = 1346729472. Its totient is φ = 448821156.

The previous prime is 897730969. The next prime is 897730979. The reversal of 897730978 is 879037798.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (897730979) 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, 16951 + ... + 45637.

It is an arithmetic number, because the mean of its divisors is an integer number (168341184).

Almost surely, 2^897730978 is an apocalyptic number.

897730978 is a deficient number, since it is larger than the sum of its proper divisors (448998494).

897730978 is a wasteful number, since it uses less digits than its factorization.

897730978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44336.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The square root of 897730978 is about 29962.1591011062. The cubic root of 897730978 is about 964.6773252469.

The spelling of 897730978 in words is "eight hundred ninety-seven million, seven hundred thirty thousand, nine hundred seventy-eight".