64742280 has 64 divisors (see below), whose sum is σ = 198979200. Its totient is φ = 16842240.

The previous prime is 64742269. The next prime is 64742281. The reversal of 64742280 is 8224746.

It is not an unprimeable number, because it can be changed into a prime (64742281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (3109050).

Almost surely, 2^64742280 is an apocalyptic number.

64742280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64742280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99489600).

64742280 is an abundant number, since it is smaller than the sum of its proper divisors (134236920).

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

64742280 is a wasteful number, since it uses less digits than its factorization.

64742280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13214 (or 13210 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 64742280 is about 8046.2587579570. The cubic root of 64742280 is about 401.5404763820.

The spelling of 64742280 in words is "sixty-four million, seven hundred forty-two thousand, two hundred eighty".