1778130372 has 12 divisors (see below), whose sum is σ = 4148970896. Its totient is φ = 592710120.

The previous prime is 1778130323. The next prime is 1778130373. The reversal of 1778130372 is 2730318771.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1778130372.

It is not an unprimeable number, because it can be changed into a prime (1778130373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74088754 + ... + 74088777.

Almost surely, 2^1778130372 is an apocalyptic number.

1778130372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1778130372 is an abundant number, since it is smaller than the sum of its proper divisors (2370840524).

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

1778130372 is a wasteful number, since it uses less digits than its factorization.

1778130372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148177538 (or 148177536 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 1778130372 is about 42167.8831813977. The cubic root of 1778130372 is about 1211.4938115384.

The spelling of 1778130372 in words is "one billion, seven hundred seventy-eight million, one hundred thirty thousand, three hundred seventy-two".