378651780 has 96 divisors (see below), whose sum is σ = 1268668800. Its totient is φ = 93204864.

The previous prime is 378651751. The next prime is 378651799. The reversal of 378651780 is 87156873.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19950 + ... + 33989.

It is an arithmetic number, because the mean of its divisors is an integer number (13215300).

Almost surely, 2^378651780 is an apocalyptic number.

378651780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

378651780 is an abundant number, since it is smaller than the sum of its proper divisors (890017020).

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

378651780 is a wasteful number, since it uses less digits than its factorization.

378651780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53970 (or 53962 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 378651780 is about 19458.9768487452. The cubic root of 378651780 is about 723.4580180106.

The spelling of 378651780 in words is "three hundred seventy-eight million, six hundred fifty-one thousand, seven hundred eighty".