42620445 has 96 divisors (see below), whose sum is σ = 93571200. Its totient is φ = 18289152.

The previous prime is 42620423. The next prime is 42620447. The reversal of 42620445 is 54402624.

It is not a de Polignac number, because 42620445 - 2²⁰ = 41571869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42620447) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 112266 + ... + 112644.

It is an arithmetic number, because the mean of its divisors is an integer number (974700).

Almost surely, 2^42620445 is an apocalyptic number.

42620445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42620445 is an abundant number, since it is smaller than the sum of its proper divisors (50950755).

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

42620445 is a wasteful number, since it uses less digits than its factorization.

42620445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 42620445 is about 6528.4335793512. The cubic root of 42620445 is about 349.3059579735.

The spelling of 42620445 in words is "forty-two million, six hundred twenty thousand, four hundred forty-five".