1621535982 has 32 divisors (see below), whose sum is σ = 3539355264. Its totient is φ = 491172000.

The previous prime is 1621535969. The next prime is 1621535987. The reversal of 1621535982 is 2895351261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621535987) 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, 262732 + ... + 268832.

It is an arithmetic number, because the mean of its divisors is an integer number (110604852).

Almost surely, 2^1621535982 is an apocalyptic number.

1621535982 is an abundant number, since it is smaller than the sum of its proper divisors (1917819282).

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

1621535982 is a wasteful number, since it uses less digits than its factorization.

1621535982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144.

The product of its digits is 129600, while the sum is 42.

The square root of 1621535982 is about 40268.2999641157. The cubic root of 1621535982 is about 1174.8313582022.

The spelling of 1621535982 in words is "one billion, six hundred twenty-one million, five hundred thirty-five thousand, nine hundred eighty-two".