864862438 has 16 divisors (see below), whose sum is σ = 1420500240. Its totient is φ = 391655200.

The previous prime is 864862429. The next prime is 864862451. The reversal of 864862438 is 834268468.

It is a junction number, because it is equal to n+sod(n) for n = 864862391 and 864862400.

It is a congruent number.

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, 67153 + ... + 78988.

It is an arithmetic number, because the mean of its divisors is an integer number (88781265).

Almost surely, 2^864862438 is an apocalyptic number.

864862438 is a deficient number, since it is larger than the sum of its proper divisors (555637802).

864862438 is a wasteful number, since it uses less digits than its factorization.

864862438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146423.

The product of its digits is 1769472, while the sum is 49.

The square root of 864862438 is about 29408.5436225598. The cubic root of 864862438 is about 952.7574320422.

The spelling of 864862438 in words is "eight hundred sixty-four million, eight hundred sixty-two thousand, four hundred thirty-eight".