402445542 has 16 divisors (see below), whose sum is σ = 805109760. Its totient is φ = 134112072.

The previous prime is 402445541. The next prime is 402445543. The reversal of 402445542 is 245544204.

It is an interprime number because it is at equal distance from previous prime (402445541) and next prime (402445543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402445541) 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 7 ways as a sum of consecutive naturals, for example, 24163 + ... + 37265.

It is an arithmetic number, because the mean of its divisors is an integer number (50319360).

Almost surely, 2^402445542 is an apocalyptic number.

402445542 is an abundant number, since it is smaller than the sum of its proper divisors (402664218).

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

402445542 is a wasteful number, since it uses less digits than its factorization.

402445542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18227.

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 402445542 is about 20061.0453865196. The cubic root of 402445542 is about 738.3048255679.

Adding to 402445542 its reverse (245544204), we get a palindrome (647989746).

The spelling of 402445542 in words is "four hundred two million, four hundred forty-five thousand, five hundred forty-two".