42699220 has 12 divisors (see below), whose sum is σ = 89668404. Its totient is φ = 17079680.

The previous prime is 42699179. The next prime is 42699229. The reversal of 42699220 is 2299624.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6290064 + 36409156 = 2508^2 + 6034^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42699229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067461 + ... + 1067500.

It is an arithmetic number, because the mean of its divisors is an integer number (7472367).

Almost surely, 2^42699220 is an apocalyptic number.

It is an amenable number.

42699220 is an abundant number, since it is smaller than the sum of its proper divisors (46969184).

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

42699220 is a wasteful number, since it uses less digits than its factorization.

42699220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134970 (or 2134968 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 42699220 is about 6534.4640178059. The cubic root of 42699220 is about 349.5210319155.

The spelling of 42699220 in words is "forty-two million, six hundred ninety-nine thousand, two hundred twenty".