4019538978 has 80 divisors (see below), whose sum is σ = 11085264960. Its totient is φ = 1060094304.

The previous prime is 4019538953. The next prime is 4019538979. The reversal of 4019538978 is 8798359104.

4019538978 is a `hidden beast` number, since 4 + 0 + 19 + 538 + 97 + 8 = 666.

4019538978 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4019538978² = 32313387191322568968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4019538979) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 121588 + ... + 151071.

It is an arithmetic number, because the mean of its divisors is an integer number (138565812).

Almost surely, 2^4019538978 is an apocalyptic number.

4019538978 is an abundant number, since it is smaller than the sum of its proper divisors (7065725982).

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

4019538978 is a wasteful number, since it uses less digits than its factorization.

4019538978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272693 (or 272684 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 4019538978 is about 63399.8342111397. The cubic root of 4019538978 is about 1589.9815376995.

The spelling of 4019538978 in words is "four billion, nineteen million, five hundred thirty-eight thousand, nine hundred seventy-eight".