1778541852 has 96 divisors (see below), whose sum is σ = 4335206400. Its totient is φ = 567133632.

The previous prime is 1778541847. The next prime is 1778541857. The reversal of 1778541852 is 2581458771.

1778541852 = T₄₃₆₈ + T₄₃₆₉ + ... + T₄₅₄₆.

It is an interprime number because it is at equal distance from previous prime (1778541847) and next prime (1778541857).

It is a super-2 number, since 2×1778541852² = 6326422238631179808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778541857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7975413 + ... + 7975635.

It is an arithmetic number, because the mean of its divisors is an integer number (45158400).

Almost surely, 2^1778541852 is an apocalyptic number.

1778541852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1778541852 is an abundant number, since it is smaller than the sum of its proper divisors (2556664548).

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

1778541852 is a wasteful number, since it uses less digits than its factorization.

1778541852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 533 counting only the distinct ones).

The product of its digits is 627200, while the sum is 48.

The square root of 1778541852 is about 42172.7619678863. The cubic root of 1778541852 is about 1211.5872555724.

The spelling of 1778541852 in words is "one billion, seven hundred seventy-eight million, five hundred forty-one thousand, eight hundred fifty-two".