378109457 has 16 divisors (see below), whose sum is σ = 416428800. Its totient is φ = 340467840.

The previous prime is 378109447. The next prime is 378109463. The reversal of 378109457 is 754901873.

It is a cyclic number.

It is not a de Polignac number, because 378109457 - 2⁴ = 378109441 is a prime.

It is a super-2 number, since 2×378109457² = 285933522945669698, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) 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 (378109447) 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, 924269 + ... + 924677.

It is an arithmetic number, because the mean of its divisors is an integer number (26026800).

Almost surely, 2^378109457 is an apocalyptic number.

It is an amenable number.

378109457 is a deficient number, since it is larger than the sum of its proper divisors (38319343).

378109457 is a wasteful number, since it uses less digits than its factorization.

378109457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 378109457 is about 19445.0368217702. The cubic root of 378109457 is about 723.1124627135.

The spelling of 378109457 in words is "three hundred seventy-eight million, one hundred nine thousand, four hundred fifty-seven".