42604040 has 32 divisors (see below), whose sum is σ = 101499480. Its totient is φ = 16038912.

The previous prime is 42604031. The next prime is 42604063. The reversal of 42604040 is 4040624.

It can be written as a sum of positive squares in 4 ways, for example, as 34975396 + 7628644 = 5914^2 + 2762^2 .

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, 30647 + ... + 32006.

Almost surely, 2^42604040 is an apocalyptic number.

42604040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42604040 is an abundant number, since it is smaller than the sum of its proper divisors (58895440).

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

42604040 is a wasteful number, since it uses less digits than its factorization.

42604040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62681 (or 62677 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42604040 is about 6527.1770314585. The cubic root of 42604040 is about 349.2611352003.

Adding to 42604040 its reverse (4040624), we get a palindrome (46644664).

The spelling of 42604040 in words is "forty-two million, six hundred four thousand, forty".