2389426778 has 8 divisors (see below), whose sum is σ = 3584598420. Its totient is φ = 1194560640.

The previous prime is 2389426777. The next prime is 2389426801. The reversal of 2389426778 is 8776249832.

It is a happy number.

2389426778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1586667889 + 802758889 = 39833^2 + 28333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2389426778² = 11418720654846922568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2389426771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55703 + ... + 88778.

Almost surely, 2^2389426778 is an apocalyptic number.

2389426778 is a deficient number, since it is larger than the sum of its proper divisors (1195171642).

2389426778 is a wasteful number, since it uses less digits than its factorization.

2389426778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152752.

The product of its digits is 8128512, while the sum is 56.

The square root of 2389426778 is about 48881.7632456113. The cubic root of 2389426778 is about 1336.8968771456.

The spelling of 2389426778 in words is "two billion, three hundred eighty-nine million, four hundred twenty-six thousand, seven hundred seventy-eight".