440002542 has 32 divisors (see below), whose sum is σ = 1007241984. Its totient is φ = 125524800.

The previous prime is 440002477. The next prime is 440002543. The reversal of 440002542 is 245200044.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440002543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21442 + ... + 36602.

It is an arithmetic number, because the mean of its divisors is an integer number (31476312).

Almost surely, 2^440002542 is an apocalyptic number.

440002542 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

440002542 is an abundant number, since it is smaller than the sum of its proper divisors (567239442).

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

440002542 is a wasteful number, since it uses less digits than its factorization.

440002542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15864.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 440002542 is about 20976.2375558631. The cubic root of 440002542 is about 760.5919568624.

Adding to 440002542 its reverse (245200044), we get a palindrome (685202586).

The spelling of 440002542 in words is "four hundred forty million, two thousand, five hundred forty-two".