240636642 has 16 divisors (see below), whose sum is σ = 490354560. Its totient is φ = 78698672.

The previous prime is 240636637. The next prime is 240636647. The reversal of 240636642 is 246636042.

It is an interprime number because it is at equal distance from previous prime (240636637) and next prime (240636647).

It is not an unprimeable number, because it can be changed into a prime (240636647) 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, 378042 + ... + 378677.

It is an arithmetic number, because the mean of its divisors is an integer number (30647160).

Almost surely, 2^240636642 is an apocalyptic number.

240636642 is an abundant number, since it is smaller than the sum of its proper divisors (249717918).

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

240636642 is a wasteful number, since it uses less digits than its factorization.

240636642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756777.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 240636642 is about 15512.4673085876. The cubic root of 240636642 is about 621.9955145577.

The spelling of 240636642 in words is "two hundred forty million, six hundred thirty-six thousand, six hundred forty-two".