40212342 has 48 divisors (see below), whose sum is σ = 91490640. Its totient is φ = 13089600.

The previous prime is 40212329. The next prime is 40212371. The reversal of 40212342 is 24321204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398092 + ... + 398192.

It is an arithmetic number, because the mean of its divisors is an integer number (1906055).

Almost surely, 2^40212342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40212342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45745320).

40212342 is an abundant number, since it is smaller than the sum of its proper divisors (51278298).

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

40212342 is a wasteful number, since it uses less digits than its factorization.

40212342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40212342 is about 6341.3202095463. The cubic root of 40212342 is about 342.5992878181.

Adding to 40212342 its reverse (24321204), we get a palindrome (64533546).

The spelling of 40212342 in words is "forty million, two hundred twelve thousand, three hundred forty-two".