1893053778 has 128 divisors (see below), whose sum is σ = 5000970240. Its totient is φ = 463129920.

The previous prime is 1893053777. The next prime is 1893053779. The reversal of 1893053778 is 8773503981.

It is an interprime number because it is at equal distance from previous prime (1893053777) and next prime (1893053779).

It is a self number, because there is not a number n which added to its sum of digits gives 1893053778.

It is not an unprimeable number, because it can be changed into a prime (1893053777) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 710613 + ... + 713271.

It is an arithmetic number, because the mean of its divisors is an integer number (39070080).

Almost surely, 2^1893053778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1893053778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500485120).

1893053778 is an abundant number, since it is smaller than the sum of its proper divisors (3107916462).

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

1893053778 is a wasteful number, since it uses less digits than its factorization.

1893053778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 1893053778 is about 43509.2378466918. The cubic root of 1893053778 is about 1237.0511305828.

The spelling of 1893053778 in words is "one billion, eight hundred ninety-three million, fifty-three thousand, seven hundred seventy-eight".