1395778864 has 10 divisors (see below), whose sum is σ = 2704321580. Its totient is φ = 697889424.

The previous prime is 1395778859. The next prime is 1395778883. The reversal of 1395778864 is 4688775931.

It is a junction number, because it is equal to n+sod(n) for n = 1395778799 and 1395778808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43618074 + ... + 43618105.

It is an arithmetic number, because the mean of its divisors is an integer number (270432158).

Almost surely, 2^1395778864 is an apocalyptic number.

It is an amenable number.

1395778864 is a deficient number, since it is larger than the sum of its proper divisors (1308542716).

1395778864 is an equidigital number, since it uses as much as digits as its factorization.

1395778864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87236187 (or 87236181 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

The square root of 1395778864 is about 37360.1239826637. The cubic root of 1395778864 is about 1117.5634915972.

The spelling of 1395778864 in words is "one billion, three hundred ninety-five million, seven hundred seventy-eight thousand, eight hundred sixty-four".