1394371864 has 8 divisors (see below), whose sum is σ = 2614447260. Its totient is φ = 697185928.

The previous prime is 1394371861. The next prime is 1394371877. The reversal of 1394371864 is 4681734931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1394371864² = 3888545790229668992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394371861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87148234 + ... + 87148249.

Almost surely, 2^1394371864 is an apocalyptic number.

It is an amenable number.

1394371864 is a deficient number, since it is larger than the sum of its proper divisors (1220075396).

1394371864 is a wasteful number, since it uses less digits than its factorization.

1394371864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174296489 (or 174296485 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 1394371864 is about 37341.2889975694. The cubic root of 1394371864 is about 1117.1878493613.

The spelling of 1394371864 in words is "one billion, three hundred ninety-four million, three hundred seventy-one thousand, eight hundred sixty-four".