864479942 has 4 divisors (see below), whose sum is σ = 1296719916. Its totient is φ = 432239970.

The previous prime is 864479939. The next prime is 864479947. The reversal of 864479942 is 249974468.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864479947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216119984 + ... + 216119987.

It is an arithmetic number, because the mean of its divisors is an integer number (324179979).

Almost surely, 2^864479942 is an apocalyptic number.

864479942 is a deficient number, since it is larger than the sum of its proper divisors (432239974).

864479942 is a wasteful number, since it uses less digits than its factorization.

864479942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432239973.

The product of its digits is 3483648, while the sum is 53.

The square root of 864479942 is about 29402.0397591732. The cubic root of 864479942 is about 952.6169551186.

The spelling of 864479942 in words is "eight hundred sixty-four million, four hundred seventy-nine thousand, nine hundred forty-two".