378774921 has 16 divisors (see below), whose sum is σ = 578647424. Its totient is φ = 215892864.

The previous prime is 378774911. The next prime is 378774923. The reversal of 378774921 is 129477873.

It is not a de Polignac number, because 378774921 - 2¹⁰ = 378773897 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378774923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14380 + ... + 31053.

It is an arithmetic number, because the mean of its divisors is an integer number (36165464).

Almost surely, 2^378774921 is an apocalyptic number.

It is an amenable number.

378774921 is a deficient number, since it is larger than the sum of its proper divisors (199872503).

378774921 is a wasteful number, since it uses less digits than its factorization.

378774921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45840.

The product of its digits is 592704, while the sum is 48.

The square root of 378774921 is about 19462.1407095931. The cubic root of 378774921 is about 723.5364345514.

The spelling of 378774921 in words is "three hundred seventy-eight million, seven hundred seventy-four thousand, nine hundred twenty-one".