394118145 has 24 divisors (see below), whose sum is σ = 685991592. Its totient is φ = 209318400.

The previous prime is 394118143. The next prime is 394118147. The reversal of 394118145 is 541811493.

It is an interprime number because it is at equal distance from previous prime (394118143) and next prime (394118147).

It can be written as a sum of positive squares in 4 ways, for example, as 126697536 + 267420609 = 11256^2 + 16353^2 .

It is not a de Polignac number, because 394118145 - 2¹ = 394118143 is a prime.

It is a super-2 number, since 2×394118145² = 310658224436482050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394118143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7326 + ... + 29015.

It is an arithmetic number, because the mean of its divisors is an integer number (28582983).

Almost surely, 2^394118145 is an apocalyptic number.

It is an amenable number.

394118145 is a deficient number, since it is larger than the sum of its proper divisors (291873447).

394118145 is a wasteful number, since it uses less digits than its factorization.

394118145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36593 (or 36590 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 394118145 is about 19852.4090477705. The cubic root of 394118145 is about 733.1769619526.

The spelling of 394118145 in words is "three hundred ninety-four million, one hundred eighteen thousand, one hundred forty-five".