4020078 has 16 divisors (see below), whose sum is σ = 8390016. Its totient is φ = 1281720.

The previous prime is 4020031. The next prime is 4020119. The reversal of 4020078 is 8700204.

It is a happy number.

It is a super-2 number, since 2×4020078² = 32322054252168, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14428 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (524376).

Almost surely, 2^4020078 is an apocalyptic number.

4020078 is an abundant number, since it is smaller than the sum of its proper divisors (4369938).

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

4020078 is a wasteful number, since it uses less digits than its factorization.

4020078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29159.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 4020078 is about 2005.0132169140. The cubic root of 4020078 is about 159.0052606938.

The spelling of 4020078 in words is "four million, twenty thousand, seventy-eight".