643483542 has 32 divisors (see below), whose sum is σ = 1395959040. Its totient is φ = 196567200.

The previous prime is 643483531. The next prime is 643483543. The reversal of 643483542 is 245384346.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 643483542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643483543) 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, 18834 + ... + 40517.

It is an arithmetic number, because the mean of its divisors is an integer number (43623720).

Almost surely, 2^643483542 is an apocalyptic number.

643483542 is an abundant number, since it is smaller than the sum of its proper divisors (752475498).

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

643483542 is a wasteful number, since it uses less digits than its factorization.

643483542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59508.

The product of its digits is 276480, while the sum is 39.

The square root of 643483542 is about 25366.9773918770. The cubic root of 643483542 is about 863.3346026758.

The spelling of 643483542 in words is "six hundred forty-three million, four hundred eighty-three thousand, five hundred forty-two".