1621148830 has 24 divisors (see below), whose sum is σ = 3394488168. Its totient is φ = 555822288.

The previous prime is 1621148797. The next prime is 1621148831. The reversal of 1621148830 is 388411261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621148831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1653744 + ... + 1654723.

It is an arithmetic number, because the mean of its divisors is an integer number (141437007).

Almost surely, 2^1621148830 is an apocalyptic number.

1621148830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1621148830 is an abundant number, since it is smaller than the sum of its proper divisors (1773339338).

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

1621148830 is a wasteful number, since it uses less digits than its factorization.

1621148830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308488 (or 3308481 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1621148830 is about 40263.4925211413. The cubic root of 1621148830 is about 1174.7378512807.

The spelling of 1621148830 in words is "one billion, six hundred twenty-one million, one hundred forty-eight thousand, eight hundred thirty".