1621430352 has 80 divisors (see below), whose sum is σ = 4927898880. Its totient is φ = 508681728.

The previous prime is 1621430297. The next prime is 1621430359. The reversal of 1621430352 is 2530341261.

1621430352 is a `hidden beast` number, since 1 + 621 + 4 + 3 + 0 + 35 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621430359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103048 + ... + 117735.

It is an arithmetic number, because the mean of its divisors is an integer number (61598736).

Almost surely, 2^1621430352 is an apocalyptic number.

1621430352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621430352 is an abundant number, since it is smaller than the sum of its proper divisors (3306468528).

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

1621430352 is a wasteful number, since it uses less digits than its factorization.

1621430352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220817 (or 220805 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1621430352 is about 40266.9883651609. The cubic root of 1621430352 is about 1174.8058473835.

The spelling of 1621430352 in words is "one billion, six hundred twenty-one million, four hundred thirty thousand, three hundred fifty-two".