4047978 has 16 divisors (see below), whose sum is σ = 8832096. Its totient is φ = 1226640.

The previous prime is 4047973. The next prime is 4047983. The reversal of 4047978 is 8797404.

It is an interprime number because it is at equal distance from previous prime (4047973) and next prime (4047983).

It is a super-2 number, since 2×4047978² = 32772251776968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4047973) 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, 30601 + ... + 30732.

It is an arithmetic number, because the mean of its divisors is an integer number (552006).

Almost surely, 2^4047978 is an apocalyptic number.

4047978 is an abundant number, since it is smaller than the sum of its proper divisors (4784118).

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

4047978 is a wasteful number, since it uses less digits than its factorization.

4047978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61349.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 4047978 is about 2011.9587470920. The cubic root of 4047978 is about 159.3722538550.

The spelling of 4047978 in words is "four million, forty-seven thousand, nine hundred seventy-eight".