42911680 has 56 divisors (see below), whose sum is σ = 116787168. Its totient is φ = 14711808.

The previous prime is 42911651. The next prime is 42911681. The reversal of 42911680 is 8611924.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42911681) 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, 7339 + ... + 11818.

Almost surely, 2^42911680 is an apocalyptic number.

42911680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42911680 is an abundant number, since it is smaller than the sum of its proper divisors (73875488).

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

42911680 is a wasteful number, since it uses less digits than its factorization.

42911680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19181 (or 19171 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 42911680 is about 6550.7007258766. The cubic root of 42911680 is about 350.0997810746.

The spelling of 42911680 in words is "forty-two million, nine hundred eleven thousand, six hundred eighty".