64730628 has 36 divisors (see below), whose sum is σ = 173251260. Its totient is φ = 20307456.

The previous prime is 64730563. The next prime is 64730657. The reversal of 64730628 is 82603746.

64730628 is a `hidden beast` number, since 647 + 3 + 0 + 6 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 5008644 = 7728^2 + 2238^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64730592 and 64730601.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52273 + ... + 53496.

It is an arithmetic number, because the mean of its divisors is an integer number (4812535).

Almost surely, 2^64730628 is an apocalyptic number.

64730628 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64730628 is an abundant number, since it is smaller than the sum of its proper divisors (108520632).

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

64730628 is a wasteful number, since it uses less digits than its factorization.

64730628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105796 (or 105791 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 64730628 is about 8045.5346621589. The cubic root of 64730628 is about 401.5163858374.

The spelling of 64730628 in words is "sixty-four million, seven hundred thirty thousand, six hundred twenty-eight".