1395694881 has 45 divisors (see below), whose sum is σ = 2429419971. Its totient is φ = 796195008.

The previous prime is 1395694847. The next prime is 1395694897. The reversal of 1395694881 is 1884965931.

The square root of 1395694881 is 37359.

It is a perfect power (a square), and thus also a powerful number.

1395694881 is a `hidden beast` number, since 1 + 39 + 569 + 48 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 858197025 + 537497856 = 29295^2 + 23184^2 .

It is not a de Polignac number, because 1395694881 - 2¹⁵ = 1395662113 is a prime.

It is a super-2 number, since 2×1395694881² = 3895928401699208322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1395694831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2353321 + ... + 2353913.

Almost surely, 2^1395694881 is an apocalyptic number.

1395694881 is the 37359-th square number.

1395694881 is the 18680-th centered octagonal number.

It is an amenable number.

1395694881 is a deficient number, since it is larger than the sum of its proper divisors (1033725090).

1395694881 is an frugal number, since it uses more digits than its factorization.

1395694881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 603 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The cubic root of 1395694881 is about 1117.5410768199.

The spelling of 1395694881 in words is "one billion, three hundred ninety-five million, six hundred ninety-four thousand, eight hundred eighty-one".