64742020 has 24 divisors (see below), whose sum is σ = 155381184. Its totient is φ = 22197216.

The previous prime is 64742017. The next prime is 64742039. The reversal of 64742020 is 2024746.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231082 + ... + 231361.

It is an arithmetic number, because the mean of its divisors is an integer number (6474216).

Almost surely, 2^64742020 is an apocalyptic number.

It is an amenable number.

64742020 is an abundant number, since it is smaller than the sum of its proper divisors (90639164).

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

64742020 is a wasteful number, since it uses less digits than its factorization.

64742020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462459 (or 462457 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 64742020 is about 8046.2426013637. The cubic root of 64742020 is about 401.5399388628.

Adding to 64742020 its reverse (2024746), we get a palindrome (66766766).

The spelling of 64742020 in words is "sixty-four million, seven hundred forty-two thousand, twenty".