42039408 has 20 divisors (see below), whose sum is σ = 108601928. Its totient is φ = 14013120.

The previous prime is 42039373. The next prime is 42039443. The reversal of 42039408 is 80493024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42039373) and next prime (42039443).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437863 + ... + 437958.

Almost surely, 2^42039408 is an apocalyptic number.

42039408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

42039408 is an abundant number, since it is smaller than the sum of its proper divisors (66562520).

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

42039408 is a wasteful number, since it uses less digits than its factorization.

42039408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875832 (or 875826 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 42039408 is about 6483.7803787605. The cubic root of 42039408 is about 347.7113473753.

The spelling of 42039408 in words is "forty-two million, thirty-nine thousand, four hundred eight".