1550057730 has 128 divisors (see below), whose sum is σ = 4105237248. Its totient is φ = 372252672.

The previous prime is 1550057713. The next prime is 1550057737. The reversal of 1550057730 is 377500551.

It is a junction number, because it is equal to n+sod(n) for n = 1550057691 and 1550057700.

It is not an unprimeable number, because it can be changed into a prime (1550057737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3579594 + ... + 3580026.

It is an arithmetic number, because the mean of its divisors is an integer number (32072166).

Almost surely, 2^1550057730 is an apocalyptic number.

1550057730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550057730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052618624).

1550057730 is an abundant number, since it is smaller than the sum of its proper divisors (2555179518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1550057730 is a wasteful number, since it uses less digits than its factorization.

1550057730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 1550057730 is about 39370.7725349656. The cubic root of 1550057730 is about 1157.3088949583.

It can be divided in two parts, 155005 and 7730, that added together give a triangular number (162735 = T₅₇₀).

The spelling of 1550057730 in words is "one billion, five hundred fifty million, fifty-seven thousand, seven hundred thirty".