1390165550 has 48 divisors (see below), whose sum is σ = 2693077632. Its totient is φ = 533299200.

The previous prime is 1390165537. The next prime is 1390165561. The reversal of 1390165550 is 555610931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390165550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171182 + ... + 179118.

It is an arithmetic number, because the mean of its divisors is an integer number (56105784).

Almost surely, 2^1390165550 is an apocalyptic number.

1390165550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390165550 is a deficient number, since it is larger than the sum of its proper divisors (1302912082).

1390165550 is a wasteful number, since it uses less digits than its factorization.

1390165550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093 (or 8088 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 1390165550 is about 37284.9238969319. The cubic root of 1390165550 is about 1116.0633343852.

The spelling of 1390165550 in words is "one billion, three hundred ninety million, one hundred sixty-five thousand, five hundred fifty".