1550720828 has 12 divisors (see below), whose sum is σ = 2807339640. Its totient is φ = 748623792.

The previous prime is 1550720761. The next prime is 1550720849. The reversal of 1550720828 is 8280270551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1550720791 and 1550720800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6684026 + ... + 6684257.

It is an arithmetic number, because the mean of its divisors is an integer number (233944970).

Almost surely, 2^1550720828 is an apocalyptic number.

It is an amenable number.

1550720828 is a deficient number, since it is larger than the sum of its proper divisors (1256618812).

1550720828 is a wasteful number, since it uses less digits than its factorization.

1550720828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13368316 (or 13368314 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 1550720828 is about 39379.1928307323. The cubic root of 1550720828 is about 1157.4738995245.

The spelling of 1550720828 in words is "one billion, five hundred fifty million, seven hundred twenty thousand, eight hundred twenty-eight".