42208040 has 32 divisors (see below), whose sum is σ = 108535680. Its totient is φ = 14471232.

The previous prime is 42208031. The next prime is 42208051. The reversal of 42208040 is 4080224.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75092 + ... + 75651.

It is an arithmetic number, because the mean of its divisors is an integer number (3391740).

Almost surely, 2^42208040 is an apocalyptic number.

42208040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42208040 is an abundant number, since it is smaller than the sum of its proper divisors (66327640).

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

42208040 is a wasteful number, since it uses less digits than its factorization.

42208040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150761 (or 150757 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 42208040 is about 6496.7715059097. The cubic root of 42208040 is about 348.1756500861.

Adding to 42208040 its reverse (4080224), we get a palindrome (46288264).

The spelling of 42208040 in words is "forty-two million, two hundred eight thousand, forty".