1621748632 has 32 divisors (see below), whose sum is σ = 3587281920. Its totient is φ = 672613920.

The previous prime is 1621748627. The next prime is 1621748633. The reversal of 1621748632 is 2368471261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621748633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465358 + ... + 468829.

It is an arithmetic number, because the mean of its divisors is an integer number (112102560).

Almost surely, 2^1621748632 is an apocalyptic number.

It is an amenable number.

1621748632 is an abundant number, since it is smaller than the sum of its proper divisors (1965533288).

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

1621748632 is a wasteful number, since it uses less digits than its factorization.

1621748632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934231 (or 934227 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 1621748632 is about 40270.9402919773. The cubic root of 1621748632 is about 1174.8827121799.

The spelling of 1621748632 in words is "one billion, six hundred twenty-one million, seven hundred forty-eight thousand, six hundred thirty-two".