1550720830 has 8 divisors (see below), whose sum is σ = 2791297512. Its totient is φ = 620288328.

The previous prime is 1550720761. The next prime is 1550720849. The reversal of 1550720830 is 380270551.

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

It is a junction number, because it is equal to n+sod(n) for n = 1550720792 and 1550720801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77536032 + ... + 77536051.

It is an arithmetic number, because the mean of its divisors is an integer number (348912189).

Almost surely, 2^1550720830 is an apocalyptic number.

1550720830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1550720830 is a deficient number, since it is larger than the sum of its proper divisors (1240576682).

1550720830 is a wasteful number, since it uses less digits than its factorization.

1550720830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155072090.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1550720830 is about 39379.1928561264. The cubic root of 1550720830 is about 1157.4739000221.

The spelling of 1550720830 in words is "one billion, five hundred fifty million, seven hundred twenty thousand, eight hundred thirty".