1947421530 has 96 divisors (see below), whose sum is σ = 5394392640. Its totient is φ = 486017280.

The previous prime is 1947421529. The next prime is 1947421537. The reversal of 1947421530 is 351247491.

It is not an unprimeable number, because it can be changed into a prime (1947421537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135070 + ... + 148790.

It is an arithmetic number, because the mean of its divisors is an integer number (56191590).

Almost surely, 2^1947421530 is an apocalyptic number.

1947421530 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 1947421530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697196320).

1947421530 is an abundant number, since it is smaller than the sum of its proper divisors (3446971110).

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

1947421530 is a wasteful number, since it uses less digits than its factorization.

1947421530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13836 (or 13833 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1947421530 is about 44129.5992503898. The cubic root of 1947421530 is about 1248.7820734427.

The spelling of 1947421530 in words is "one billion, nine hundred forty-seven million, four hundred twenty-one thousand, five hundred thirty".