578947978 has 8 divisors (see below), whose sum is σ = 992482272. Its totient is φ = 248120556.

The previous prime is 578947969. The next prime is 578947979. The reversal of 578947978 is 879749875.

It is a happy number.

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

It is a super-2 number, since 2×578947978² = 670361522460576968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (578947979) 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, 20676700 + ... + 20676727.

It is an arithmetic number, because the mean of its divisors is an integer number (124060284).

Almost surely, 2^578947978 is an apocalyptic number.

578947978 is a deficient number, since it is larger than the sum of its proper divisors (413534294).

578947978 is a wasteful number, since it uses less digits than its factorization.

578947978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41353436.

The product of its digits is 35562240, while the sum is 64.

The square root of 578947978 is about 24061.3378264801. The cubic root of 578947978 is about 833.4505685019.

The spelling of 578947978 in words is "five hundred seventy-eight million, nine hundred forty-seven thousand, nine hundred seventy-eight".