2029620978 has 48 divisors (see below), whose sum is σ = 5482616256. Its totient is φ = 527173920.

The previous prime is 2029620961. The next prime is 2029621001. The reversal of 2029620978 is 8790269202.

It is a super-2 number, since 2×2029620978² = 8238722628675352968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 730801 + ... + 733572.

It is an arithmetic number, because the mean of its divisors is an integer number (114221172).

Almost surely, 2^2029620978 is an apocalyptic number.

2029620978 is an abundant number, since it is smaller than the sum of its proper divisors (3452995278).

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

2029620978 is a wasteful number, since it uses less digits than its factorization.

2029620978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464399 (or 1464396 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2029620978 is about 45051.3149419637. The cubic root of 2029620978 is about 1266.1106085461.

The spelling of 2029620978 in words is "two billion, twenty-nine million, six hundred twenty thousand, nine hundred seventy-eight".