1530381790 has 128 divisors (see below), whose sum is σ = 3443420160. Its totient is φ = 478006272.

The previous prime is 1530381781. The next prime is 1530381793. The reversal of 1530381790 is 971830351.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530381793) 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, 6741657 + ... + 6741883.

It is an arithmetic number, because the mean of its divisors is an integer number (26901720).

Almost surely, 2^1530381790 is an apocalyptic number.

1530381790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1530381790 is an abundant number, since it is smaller than the sum of its proper divisors (1913038370).

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

1530381790 is a wasteful number, since it uses less digits than its factorization.

1530381790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1530381790 is about 39120.0944528512. The cubic root of 1530381790 is about 1152.3911909108.

The spelling of 1530381790 in words is "one billion, five hundred thirty million, three hundred eighty-one thousand, seven hundred ninety".