42288340 has 24 divisors (see below), whose sum is σ = 91671552. Its totient is φ = 16369440.

The previous prime is 42288331. The next prime is 42288349. The reversal of 42288340 is 4388224.

It is an interprime number because it is at equal distance from previous prime (42288331) and next prime (42288349).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42288349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33484 + ... + 34723.

It is an arithmetic number, because the mean of its divisors is an integer number (3819648).

Almost surely, 2^42288340 is an apocalyptic number.

It is an amenable number.

42288340 is an abundant number, since it is smaller than the sum of its proper divisors (49383212).

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

42288340 is a wasteful number, since it uses less digits than its factorization.

42288340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68247 (or 68245 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 42288340 is about 6502.9485619986. The cubic root of 42288340 is about 348.3963094143.

The spelling of 42288340 in words is "forty-two million, two hundred eighty-eight thousand, three hundred forty".