1395026649 has 6 divisors (see below), whose sum is σ = 2015038506. Its totient is φ = 930017760.

The previous prime is 1395026623. The next prime is 1395026671. The reversal of 1395026649 is 9466205931.

1395026649 is a `hidden beast` number, since 139 + 502 + 6 + 6 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1222761024 + 172265625 = 34968^2 + 13125^2 .

It is not a de Polignac number, because 1395026649 - 2²³ = 1386638041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1395026609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77501472 + ... + 77501489.

It is an arithmetic number, because the mean of its divisors is an integer number (335839751).

Almost surely, 2^1395026649 is an apocalyptic number.

It is an amenable number.

1395026649 is a deficient number, since it is larger than the sum of its proper divisors (620011857).

1395026649 is a wasteful number, since it uses less digits than its factorization.

1395026649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155002967 (or 155002964 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 1395026649 is about 37350.0555421274. The cubic root of 1395026649 is about 1117.3626959212.

The spelling of 1395026649 in words is "one billion, three hundred ninety-five million, twenty-six thousand, six hundred forty-nine".