4321920778 has 16 divisors (see below), whose sum is σ = 7844831424. Its totient is φ = 1743295680.

The previous prime is 4321920763. The next prime is 4321920793. The reversal of 4321920778 is 8770291234.

It is an interprime number because it is at equal distance from previous prime (4321920763) and next prime (4321920793).

It is a super-2 number, since 2×4321920778² = 37357998422616250568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9079428 + ... + 9079903.

It is an arithmetic number, because the mean of its divisors is an integer number (490301964).

Almost surely, 2^4321920778 is an apocalyptic number.

4321920778 is a deficient number, since it is larger than the sum of its proper divisors (3522910646).

4321920778 is a wasteful number, since it uses less digits than its factorization.

4321920778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18159357.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 4321920778 is about 65741.3171300971. The cubic root of 4321920778 is about 1628.8919135266.

The spelling of 4321920778 in words is "four billion, three hundred twenty-one million, nine hundred twenty thousand, seven hundred seventy-eight".