64238780 has 12 divisors (see below), whose sum is σ = 134901480. Its totient is φ = 25695504.

The previous prime is 64238773. The next prime is 64238803. The reversal of 64238780 is 8783246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605950 + ... + 1605989.

It is an arithmetic number, because the mean of its divisors is an integer number (11241790).

Almost surely, 2^64238780 is an apocalyptic number.

It is an amenable number.

64238780 is an abundant number, since it is smaller than the sum of its proper divisors (70662700).

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

64238780 is a wasteful number, since it uses less digits than its factorization.

64238780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211948 (or 3211946 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 64238780 is about 8014.9098560121. The cubic root of 64238780 is about 400.4968409505.

The spelling of 64238780 in words is "sixty-four million, two hundred thirty-eight thousand, seven hundred eighty".