1385155977 has 8 divisors (see below), whose sum is σ = 1863818880. Its totient is φ = 914965200.

The previous prime is 1385155973. The next prime is 1385155999. The reversal of 1385155977 is 7795515831.

It is a happy number.

1385155977 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1385155977 - 2² = 1385155973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385155973) 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, 2117649 + ... + 2118302.

It is an arithmetic number, because the mean of its divisors is an integer number (232977360).

Almost surely, 2^1385155977 is an apocalyptic number.

It is an amenable number.

1385155977 is a deficient number, since it is larger than the sum of its proper divisors (478662903).

1385155977 is a wasteful number, since it uses less digits than its factorization.

1385155977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236063.

The product of its digits is 1323000, while the sum is 51.

The square root of 1385155977 is about 37217.6836597873. The cubic root of 1385155977 is about 1114.7211129265.

The spelling of 1385155977 in words is "one billion, three hundred eighty-five million, one hundred fifty-five thousand, nine hundred seventy-seven".