2077778250 has 256 divisors, whose sum is σ = 6429196800. Its totient is φ = 493516800.

The previous prime is 2077778237. The next prime is 2077778257. The reversal of 2077778250 is 528777702.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 2077778196 and 2077778205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2077778257) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2179774 + ... + 2180726.

It is an arithmetic number, because the mean of its divisors is an integer number (25114050).

Almost surely, 2^2077778250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2077778250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3214598400).

2077778250 is an abundant number, since it is smaller than the sum of its proper divisors (4351418550).

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

2077778250 is a wasteful number, since it uses less digits than its factorization.

2077778250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 2077778250 is about 45582.6529504372. The cubic root of 2077778250 is about 1276.0462001301.

The spelling of 2077778250 in words is "two billion, seventy-seven million, seven hundred seventy-eight thousand, two hundred fifty".