1396377789 has 8 divisors (see below), whose sum is σ = 1863418272. Its totient is φ = 930127920.

The previous prime is 1396377769. The next prime is 1396377881. The reversal of 1396377789 is 9877736931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1396377789 - 2²⁷ = 1262160061 is a prime.

It is a super-2 number, since 2×1396377789² = 3899741859225057042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396377769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193519 + ... + 200604.

It is an arithmetic number, because the mean of its divisors is an integer number (232927284).

Almost surely, 2^1396377789 is an apocalyptic number.

It is an amenable number.

1396377789 is a deficient number, since it is larger than the sum of its proper divisors (467040483).

1396377789 is a wasteful number, since it uses less digits than its factorization.

1396377789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395307.

The product of its digits is 12002256, while the sum is 60.

The square root of 1396377789 is about 37368.1386879250. The cubic root of 1396377789 is about 1117.7233165803.

The spelling of 1396377789 in words is "one billion, three hundred ninety-six million, three hundred seventy-seven thousand, seven hundred eighty-nine".