40286442 has 32 divisors (see below), whose sum is σ = 94228992. Its totient is φ = 11242224.

The previous prime is 40286429. The next prime is 40286443. The reversal of 40286442 is 24468204.

It is not an unprimeable number, because it can be changed into a prime (40286443) 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, 9348 + ... + 12959.

It is an arithmetic number, because the mean of its divisors is an integer number (2944656).

Almost surely, 2^40286442 is an apocalyptic number.

40286442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

40286442 is an abundant number, since it is smaller than the sum of its proper divisors (53942550).

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

40286442 is a wasteful number, since it uses less digits than its factorization.

40286442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22362.

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 40286442 is about 6347.1601523831. The cubic root of 40286442 is about 342.8095966310.

The spelling of 40286442 in words is "forty million, two hundred eighty-six thousand, four hundred forty-two".