2001387642 has 32 divisors (see below), whose sum is σ = 4181051520. Its totient is φ = 637475520.

The previous prime is 2001387601. The next prime is 2001387649. The reversal of 2001387642 is 2467831002.

2001387642 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2001387649) 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, 139584 + ... + 153252.

It is an arithmetic number, because the mean of its divisors is an integer number (130657860).

Almost surely, 2^2001387642 is an apocalyptic number.

2001387642 is an abundant number, since it is smaller than the sum of its proper divisors (2179663878).

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

2001387642 is a wasteful number, since it uses less digits than its factorization.

2001387642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14758.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 2001387642 is about 44736.8711690927. The cubic root of 2001387642 is about 1260.2123690917.

The spelling of 2001387642 in words is "two billion, one million, three hundred eighty-seven thousand, six hundred forty-two".