920167978 has 16 divisors (see below), whose sum is σ = 1428779520. Its totient is φ = 443991600.

The previous prime is 920167957. The next prime is 920167979. The reversal of 920167978 is 879761029.

It is a happy number.

920167978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (920167979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588 + ... + 42928.

It is an arithmetic number, because the mean of its divisors is an integer number (89298720).

Almost surely, 2^920167978 is an apocalyptic number.

920167978 is a deficient number, since it is larger than the sum of its proper divisors (508611542).

920167978 is a wasteful number, since it uses less digits than its factorization.

920167978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41733.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 920167978 is about 30334.2706851508. The cubic root of 920167978 is about 972.6480159231.

The spelling of 920167978 in words is "nine hundred twenty million, one hundred sixty-seven thousand, nine hundred seventy-eight".