978006172 has 48 divisors (see below), whose sum is σ = 2026708992. Its totient is φ = 407090880.

The previous prime is 978006167. The next prime is 978006173. The reversal of 978006172 is 271600879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978006173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65913 + ... + 79375.

It is an arithmetic number, because the mean of its divisors is an integer number (42223104).

Almost surely, 2^978006172 is an apocalyptic number.

It is an amenable number.

978006172 is an abundant number, since it is smaller than the sum of its proper divisors (1048702820).

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

978006172 is a wasteful number, since it uses less digits than its factorization.

978006172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13618 (or 13616 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 978006172 is about 31273.0902214668. The cubic root of 978006172 is about 992.6143098739.

The spelling of 978006172 in words is "nine hundred seventy-eight million, six thousand, one hundred seventy-two".