972182778 has 32 divisors (see below), whose sum is σ = 2247108480. Its totient is φ = 274644480.

The previous prime is 972182777. The next prime is 972182801. The reversal of 972182778 is 877281279.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 972182778.

It is not an unprimeable number, because it can be changed into a prime (972182773) 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, 126303 + ... + 133778.

It is an arithmetic number, because the mean of its divisors is an integer number (70222140).

Almost surely, 2^972182778 is an apocalyptic number.

972182778 is an abundant number, since it is smaller than the sum of its proper divisors (1274925702).

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

972182778 is a wasteful number, since it uses less digits than its factorization.

972182778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260182.

The product of its digits is 790272, while the sum is 51.

The square root of 972182778 is about 31179.8457019915. The cubic root of 972182778 is about 990.6402612768.

The spelling of 972182778 in words is "nine hundred seventy-two million, one hundred eighty-two thousand, seven hundred seventy-eight".