1390400165 has 32 divisors (see below), whose sum is σ = 2202557184. Its totient is φ = 815754240.

The previous prime is 1390400113. The next prime is 1390400173. The reversal of 1390400165 is 5610040931.

It is not a de Polignac number, because 1390400165 - 2⁶ = 1390400101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99674 + ... + 112763.

It is an arithmetic number, because the mean of its divisors is an integer number (68829912).

Almost surely, 2^1390400165 is an apocalyptic number.

It is an amenable number.

1390400165 is a deficient number, since it is larger than the sum of its proper divisors (812157019).

1390400165 is a wasteful number, since it uses less digits than its factorization.

1390400165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212477.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1390400165 is about 37288.0700090525. The cubic root of 1390400165 is about 1116.1261159894.

The spelling of 1390400165 in words is "one billion, three hundred ninety million, four hundred thousand, one hundred sixty-five".