394145772 has 24 divisors (see below), whose sum is σ = 921126192. Its totient is φ = 131174400.

The previous prime is 394145767. The next prime is 394145809. The reversal of 394145772 is 277541493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17929 + ... + 33312.

It is an arithmetic number, because the mean of its divisors is an integer number (38380258).

Almost surely, 2^394145772 is an apocalyptic number.

It is an amenable number.

394145772 is an abundant number, since it is smaller than the sum of its proper divisors (526980420).

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

394145772 is a wasteful number, since it uses less digits than its factorization.

394145772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51889 (or 51887 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 394145772 is about 19853.1048453384. The cubic root of 394145772 is about 733.1940930311.

The spelling of 394145772 in words is "three hundred ninety-four million, one hundred forty-five thousand, seven hundred seventy-two".