42820402 has 8 divisors (see below), whose sum is σ = 64306476. Its totient is φ = 21384912.

The previous prime is 42820391. The next prime is 42820403. The reversal of 42820402 is 20402824.

It can be written as a sum of positive squares in 2 ways, for example, as 42784681 + 35721 = 6541^2 + 189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42820403) 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, 10453 + ... + 13960.

Almost surely, 2^42820402 is an apocalyptic number.

42820402 is a deficient number, since it is larger than the sum of its proper divisors (21486074).

42820402 is a wasteful number, since it uses less digits than its factorization.

42820402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25292.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 42820402 is about 6543.7299760916. The cubic root of 42820402 is about 349.8513709065.

The spelling of 42820402 in words is "forty-two million, eight hundred twenty thousand, four hundred two".