2077778 has 8 divisors (see below), whose sum is σ = 3129840. Its totient is φ = 1034500.

The previous prime is 2077771. The next prime is 2077781. The reversal of 2077778 is 8777702.

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

It is a super-2 number, since 2×2077778² = 8634322834568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2077771) 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, 1568 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (391230).

2^2077778 is an apocalyptic number.

2077778 is a deficient number, since it is larger than the sum of its proper divisors (1052062).

2077778 is a wasteful number, since it uses less digits than its factorization.

2077778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392.

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 2077778 is about 1441.4499644455. The cubic root of 2077778 is about 127.6046148952.

The spelling of 2077778 in words is "two million, seventy-seven thousand, seven hundred seventy-eight".