1778004680 has 16 divisors (see below), whose sum is σ = 4000510620. Its totient is φ = 711201856.

The previous prime is 1778004671. The next prime is 1778004737. The reversal of 1778004680 is 864008771.

It can be written as a sum of positive squares in 2 ways, for example, as 1777971556 + 33124 = 42166^2 + 182^2 .

It is a super-2 number, since 2×1778004680² = 6322601284203804800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22225019 + ... + 22225098.

Almost surely, 2^1778004680 is an apocalyptic number.

1778004680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1778004680 is an abundant number, since it is smaller than the sum of its proper divisors (2222505940).

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

1778004680 is a wasteful number, since it uses less digits than its factorization.

1778004680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44450128 (or 44450124 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1778004680 is about 42166.3927790842. The cubic root of 1778004680 is about 1211.4652649498.

The spelling of 1778004680 in words is "one billion, seven hundred seventy-eight million, four thousand, six hundred eighty".